Author Topic: Aftermarket vs NOS sheetmetal  (Read 464 times)

chief poncho

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Aftermarket vs NOS sheetmetal
« on: June 06, 2018, 04:02:52 PM »
I know this has been hashed over 1000 times on 1000 forums, but I have to ask the question with regard to the latest panels coming out of the aftermarket places.  As expected, my car is going to need rear 1/4 panels and some floor panel replacement.  Most of the other parts like doors, rockers, appear to be pretty solid.  My question is with regard to the new Goodmark and probably other brand full 1/4's?  Is the fit ok?  Is this something you pay $500 for and spend another $2000 getting them fitted properly?  I can probably get some NOS sheetmetal for around $4k which is a ton of money, but then again, this is going into a '71 TA so it'll probably be worth it in the end.  I just don't want to drop a ton of money on something that isn't much better than the aftermarket stuff.

Any experience with Goodmark, OER, Dynacorn or other sheetmetal suppliers?  Recent experience is what I'm looking for. 
1971 Lucerne Blue Trans Am (455HO, Automatic) - currently my project car.
Previously Owned TA's/Musclecars: 2002 Pewter WS6/M6 Trans Am, 1968 Dodge Superbee 383/4speed,  1975 TA 455/4speed, 1989 Mustang LX 5.0/5speed, 1980 TA Indy Pace Car, 1977 TA 400/Auto, 1989 GTA 350TPI, 1990 GTA 350TPI, 1986 IROC 305TPI, 1989 Mustang LX 5.0/Auto, 1993 Mitsu 3000GT VR4 (and probably a few I've forgotten about)

critter

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Re: Aftermarket vs NOS sheetmetal
« Reply #1 on: June 07, 2018, 08:13:41 AM »
Look at page 4 of my build thread.

http://transamcountry.com/community/index.php?topic=67963.120

Goodmark quarter wasn't bad but probably not as good as NOS. I simply couldn't find any NOS quarters for 1974 because it's a one year only quarter panel. Those that have one want anywhere from $1,500 - $2,500 for a quarter. Overall I'd give Goodmark a thumbs up.
Been there, done that, t-shirt is now a shop rag.

70RAIV455

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Re: Aftermarket vs NOS sheetmetal
« Reply #2 on: June 07, 2018, 10:00:40 PM »
If you can afford NOS GM is the way to go .

FormTA

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Re: Aftermarket vs NOS sheetmetal
« Reply #3 on: June 08, 2018, 04:55:24 AM »
It's not bad. I have used partial quarters but they needed some tweaking as the body lines were off a bit. Torque boxes and floor pans seem pretty good. The stamps are not as crisp but they are pretty close.
79 Trans am 301 (work in progress) LS swap n progress
79 Formula 301 (Work in progress)
67 RS Camaro (Work in progress)
See the recurring theme???

roadking77

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Re: Aftermarket vs NOS sheetmetal
« Reply #4 on: June 08, 2018, 05:02:04 AM »
That is a car worth putting the extra money into. However if you, like most of us, are on a tight budget I cant imagine the aftermarket stuff is so bad that it cant be used with success.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
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Re: Aftermarket vs NOS sheetmetal
« Reply #4 on: June 08, 2018, 05:02:04 AM »

70RAIV455

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Re: Aftermarket vs NOS sheetmetal
« Reply #5 on: June 08, 2018, 12:42:51 PM »
Everything Excellent or Best costs much more money.

nas t eh

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Re: Aftermarket vs NOS sheetmetal
« Reply #6 on: June 09, 2018, 12:01:39 PM »
If you do get aftermarket I can tell you two things to check before you install them.

1. Test fit the side marker light housing and grill Fitment on both sides Some are stamped wrong.
2. Check the body line as it blends into the wheel opening both leading and trailing edges. This is a little more fixable then the first one.

There are likely other issues to watch for as well but finding out after the 1/4 panel is installed and cutting it back off to put a better piece on sucks.
current
73 T/A 4speed
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75 T/A 455 4speed
75 T/A 400 4speed

chief poncho

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Re: Aftermarket vs NOS sheetmetal
« Reply #7 on: June 12, 2018, 01:57:17 PM »
Critter, great write up on that goodmark panel, thanks!  After getting the car back from the media blaster, I'll definitely need a couple of 1/4 panels although I don't think I'll need full replacements.  Given that, maybe the aftermarket panels will work fine for my application.  I actually have one from tamraz for the right side that looks pretty good.  It's not the full panel, but rather the 3/4 panel that doesn't go all the way up to the roof line.  Since the upper part of my 1/4's are in great shape maybe this is the way to go.  In the meantime, I have located 2 NOS panels, but the price tag is way up there.  $5k shipped for both.  $5k buys about 60 hours of body work.  I would hope any rework required to make the aftermarket fixed wouldn't take that many hours.  Then again, in the grand scheme of things $5k for sheetmetal isn't that much considering what the car would be worth when finished.  Decisions decisions....

The body shop recommended waiting on any sheetmetal purchases until they have a chance to assess what it'll need.  They won't be able to get to the car until October though.  Maybe I'll just keep an eye out for some deals on some NOS parts until then. 
1971 Lucerne Blue Trans Am (455HO, Automatic) - currently my project car.
Previously Owned TA's/Musclecars: 2002 Pewter WS6/M6 Trans Am, 1968 Dodge Superbee 383/4speed,  1975 TA 455/4speed, 1989 Mustang LX 5.0/5speed, 1980 TA Indy Pace Car, 1977 TA 400/Auto, 1989 GTA 350TPI, 1990 GTA 350TPI, 1986 IROC 305TPI, 1989 Mustang LX 5.0/Auto, 1993 Mitsu 3000GT VR4 (and probably a few I've forgotten about)

critter

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Re: Aftermarket vs NOS sheetmetal
« Reply #8 on: June 13, 2018, 07:19:18 AM »
I'd have to agree with your shop. I wouldn't purchase a darned thing until they've cut out the rot and you know exactly what you're looking at. Good luck with the project.
Been there, done that, t-shirt is now a shop rag.

roadking77

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Re: Aftermarket vs NOS sheetmetal
« Reply #9 on: June 13, 2018, 07:29:28 AM »
Yea, that's a pretty big expense just because... You may only need the bottom of the quarters and in that case i would think an aftermarket part would be a lot easier to deal with. On the other hand if the nos quarters are that hard to find,(and i imagine they are) and you have the funds available, you may want to grab them while you can. If you dont use them you can always do a resale in a year or so.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

chief poncho

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Re: Aftermarket vs NOS sheetmetal
« Reply #10 on: June 13, 2018, 10:12:01 AM »
Quote
if the nos quarters are that hard to find,(and i imagine they are) and you have the funds available, you may want to grab them while you can. If you dont use them you can always do a resale in a year or so.

Yeah, that's the other problem.  I occaisionally see one side or the other pop up on ebay or some of the other listing sites, but rarely both sides at the same time.  Plus I also need the rear panel, but again only for the bottom valance area.  I was thinking that would be less critical than going with NOS because most of it is covered.  It would suck if it wasn't sized correctly though.
1971 Lucerne Blue Trans Am (455HO, Automatic) - currently my project car.
Previously Owned TA's/Musclecars: 2002 Pewter WS6/M6 Trans Am, 1968 Dodge Superbee 383/4speed,  1975 TA 455/4speed, 1989 Mustang LX 5.0/5speed, 1980 TA Indy Pace Car, 1977 TA 400/Auto, 1989 GTA 350TPI, 1990 GTA 350TPI, 1986 IROC 305TPI, 1989 Mustang LX 5.0/Auto, 1993 Mitsu 3000GT VR4 (and probably a few I've forgotten about)

70RAIV455

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Re: Aftermarket vs NOS sheetmetal
« Reply #11 on: June 13, 2018, 10:29:15 PM »
Quote
if the nos quarters are that hard to find,(and i imagine they are) and you have the funds available, you may want to grab them while you can. If you dont use them you can always do a resale in a year or so.

Yeah, that's the other problem.  I occaisionally see one side or the other pop up on ebay or some of the other listing sites, but rarely both sides at the same time.  Plus I also need the rear panel, but again only for the bottom valance area.  I was thinking that would be less critical than going with NOS because most of it is covered.  It would suck if it wasn't sized correctly though.
Many of the musclecars I have seen with partial quarters put on 10 years back or longer you can see the bodywork coming through now.
One Long seam in the middle.
Body filler shrinks many times.

See the seam inside of the Trunk often too.

Old School Correct way is to Hammer Weld. Its a Lost art.
Difficult if not impossible doing partial 1/4s Hammer welding on a F-body.
Old Timers Leaded panels too. 

Early TA's to own are expensive.



70RAIV455

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Re: Aftermarket vs NOS sheetmetal
« Reply #12 on: June 13, 2018, 10:33:37 PM »
5000 /60 hours = $83 per hour shop rate.

An option is to find a Pro Body man than does work out of his home garage at night.
Pay him $40- $50 per hour.
Or Bid Job that he agrees to.

I grew up next door to a Pro Bodyman.
He took care of me.

chief poncho

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Re: Aftermarket vs NOS sheetmetal
« Reply #13 on: June 14, 2018, 10:43:02 AM »
I've looked all over for a shop I felt I could trust.  I agree, $40-50 would be a lot better than the $85 the shop is going to charge me, but I haven't found anyone willing or that I trust enough to do the work on their own.  I have thought many times about learning how to do it on my own, but I'm afraid I'll ruin it.  You're right about the welding in patch panels or partial quarters in that they may not turn out the best in the long run.  However, I will say the tons of bondo and crap that was covered for the 30 years I owned the car sure held up well.  I had no idea the passenger rear quarter was that mangled.  Most of it had been reformed with bondo.  Maybe the dry climate here in AZ is just easier on body filler than areas where moisture may cause expansion and contraction.  Plus we rarely see any freezing weather and that may help too since it won't contract to a point to cause cracking.

However,  for the few extra dollars full repro quarters cost, I will definitely go that route as opposed to partial panels, especially if I don't go NOS.  Besides, it seems the labor hours to replace the full quarter are less than patch panels.

« Last Edit: June 14, 2018, 10:44:52 AM by chief poncho »
1971 Lucerne Blue Trans Am (455HO, Automatic) - currently my project car.
Previously Owned TA's/Musclecars: 2002 Pewter WS6/M6 Trans Am, 1968 Dodge Superbee 383/4speed,  1975 TA 455/4speed, 1989 Mustang LX 5.0/5speed, 1980 TA Indy Pace Car, 1977 TA 400/Auto, 1989 GTA 350TPI, 1990 GTA 350TPI, 1986 IROC 305TPI, 1989 Mustang LX 5.0/Auto, 1993 Mitsu 3000GT VR4 (and probably a few I've forgotten about)

critter

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Re: Aftermarket vs NOS sheetmetal
« Reply #14 on: June 14, 2018, 12:49:24 PM »
30 years ago plastic fillers might shrink back. Not anymore. Not if used correctly. Now if they're slathering on inch thick filler, sure you can have a problem. But that's not how it was intended to be applied. Any experienced body man will tell you it's a filler coat, not a fix for bad bodywork. Keep it less than 1/4 inch (1/8th or less is optimal) and you will never have an issue.
Been there, done that, t-shirt is now a shop rag.

Re: Aftermarket vs NOS sheetmetal
« Reply #14 on: June 14, 2018, 12:49:24 PM »

roadking77

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Re: Aftermarket vs NOS sheetmetal
« Reply #15 on: June 14, 2018, 04:21:44 PM »
Having done a bit of body work, I would def think it would be easier to replace the full piece than to patch in a spot and then make it blend in right. Buddy of mine that knew far more than me tried to talk me into replacing my entire floor, but I chickened out and just replaced the bad spots. Wouldve been easier in the long run doing the whole floor.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

70RAIV455

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Re: Aftermarket vs NOS sheetmetal
« Reply #16 on: June 14, 2018, 05:54:24 PM »
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Re: Aftermarket vs NOS sheetmetal
« Reply #16 on: June 14, 2018, 05:54:24 PM »
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