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Mechanical / Re: What is the difference between Round Port and D Port?
« Last post by nas t eh on Today at 12:02:41 AM »
The list of Pontiac motors with round port heads is short,
1. 1968 400 RAII
2. 1969-70 400 RAIV
3. 1971-72 455 HO
4. 1973-74 455 SD
5. All the variants of the RAV

The round port heads of the first 4 on this list have larger (taller) intake and bigger better shaped exhaust ports with much higher flow characteristics. All also have the bigger 1.77” exhaust valves.

The V are different again with even bigger separate ports with the valves relocated in an IEIEIEIE arrangement instead of EIIEEIIE

If you are thinking of buying new aluminum heads even the D-ports flow very well out of the box and if bought set up from one of the big Pontiac shops can be CNC ported for only a little more to flow extremely well for street use. Round port aluminum heads have even more flow and more ported potential.
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Mechanical / Re: Pontiac 350 Block ONLY Thread
« Last post by EspriTA350 on October 21, 2019, 11:09:21 PM »
I picked these 350 head gaskets up for a song and dance, stated to be NOS from a complete fel-pro engine gasket set. The box looked ancient! They are stamped "Made in usa" and also "Fitzgerald 0979L". This may be a dumb question but I'm only asking since I honestly don't know how to tell the difference.. are these composite or mls gaskets?



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Mechanical / Re: What is the difference between Round Port and D Port?
« Last post by Jack on October 21, 2019, 10:24:58 PM »
Good question, but I don't think you got an answer as far as which is better. I did not think there was a differance between the 2 other than round is rare and therefore very expensive.
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Mechanical / Original manifolds Pontiac Trans Am 1975
« Last post by Bandit1975 on October 21, 2019, 10:22:39 PM »
Are there different types of right side ( seen from inside car) cast iron manifolds on a AC car and a non AC car ?
Seems to be some mounting bar backside of the AC compressor connected to the manifold .... but I`m not sure
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Hobbies / Re: Building a deck
« Last post by Jack on October 21, 2019, 09:20:27 PM »
Had some free time and did some more work. Working alone and had to come up with creative ways of supporting the beam.



And I think this is it for the season, I also bolted a railing to prevent the grill from falling over.

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Lobby / Re: Today I...
« Last post by Jack on October 21, 2019, 09:08:23 PM »
Had to do something similar with my daughters car except she got a flat and did not have the tool to remove the wheel. I wasted a perfectly good socket removing the wheel.
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Lobby / Re: Today I...
« Last post by FormTA on October 21, 2019, 08:50:43 PM »
Oh wow. That's a good public service announcement.  Never would have thought of that. What a pain having to tear apart your truck just to get the spare off. Good thing you weren't stranded....
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Projects & Restorations / Re: Project QuickBird with LS swap
« Last post by FormTA on October 21, 2019, 08:25:51 PM »
Measured the lettering on the spoiler.  I also laid the repop decal next to the original to see how close they are. The only thing I can see different is the spacing between letters is a bit different.















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Parts Review / Re: OER trunk weatherstrip vs Metro
« Last post by stros on October 21, 2019, 08:22:02 PM »
The Soffseal is definitely better than the OER stuff.  You should be ok with it.
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Electrical / Re: power windows
« Last post by FormTA on October 21, 2019, 08:19:20 PM »
Nice post. Thanks! I'll be at this point sometime soon.
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