2020-B4-3

Author Topic: Ls swap headers interchange  (Read 210 times)

TAFieldMech

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Ls swap headers interchange
« on: November 30, 2020, 12:15:19 AM »
So I've heard that the late model fbody headers will fit with massaging on the DS, has anyone tried gbody headers? I've also read that some are cutting the flanges off bbc headers and welding on ls headers. I'm looking at doing mid length headers because I don't want the collectors superlow because the car will be lowered. I am not looking to spend a ridiculous amount on headers. What has everyone experienced so far?    Not sure of header fitment issues yet but the plan on going with a 4l80e. Thanks in advance.

jonathonar89

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Re: Ls swap headers interchange
« Reply #1 on: November 30, 2020, 01:42:53 PM »
Keep in mind, there are two different manifolds for F-Body LS1.  The versions are 98-99 and 00-02 if I recall.  I might be regurgitating Internet facts, but earlier models are supposed to fit better.

I’m actually thinking about doing the Trailblazer V8 manifolds myself...hopefully they fit.

TAFieldMech

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Re: Ls swap headers interchange
« Reply #2 on: November 30, 2020, 06:56:55 PM »
Yea I've read about the manifolds, I am looking though  to do headers

ryeguy2006a

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Re: Ls swap headers interchange
« Reply #3 on: December 01, 2020, 07:07:09 AM »
Before you start to look at headers, I would first ask what engine mounts you are using. The engine mounts will make or break the fitment of your headers or manifolds. If I were you, I'd suggest looking at the Speed Engineering headers made for 70-81 Fbody cars. They are right in the neighborhood of $300, stainless steel and have large 1 7/8" primary tubes. Amazing bargain there.

1976 Trans Am LS1, 6 speed, C5 Brakes, LS1 rear 12" brakes, and much more...SOLD
My Build: http://transamcountry.com/community/index.php?topic=24465.0

New project: 1968 Camaro LS6, T56, Speedtech, Hotchkis, DSE, Z51 13.4" front brakes, LS1 rear disks, etc.
http://transamcountry.com/community/index.php?topic=74591.0

Wallington

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Re: Ls swap headers interchange
« Reply #4 on: December 30, 2020, 06:55:20 PM »
And what engine mounts work with those, or what don't?

jonathonar89

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Re: Ls swap headers interchange
« Reply #5 on: December 31, 2020, 10:11:15 PM »
And what engine mounts work with those, or what don't?

Dirty Dingo is popular.  Most people on the LSX Facebook page use/recommend the Holley mounts. 

Re: Ls swap headers interchange
« Reply #5 on: December 31, 2020, 10:11:15 PM »
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