5.3 swap help!

[beto101]

Ok finally getting to doing my 5.3 swap into my 80 K5. I have one issue so far and that's the driver side manifold is inside the chassis. Anyone know if they make headers for the K-series trucks with LS swap? Any other ideas besides torching away the chassis?

 

[Captainfab]

What is the original application for the exhaust manifolds? Some guys say the LS1 F-body manifolds work better. Doug Thorley makes LSX headers for trucks, but they aren't cheap.

 

[beto101]

5.3 swap help

Engine is out of 03 yukon. I've tried looking for the f body manifolds and no luck in my are

 

[beto101]

I have one more question. If I change the maniflods to the F-body manifolds will my stock "Y" pipe from thr donor vehicle?

 

[Captainfab]

I hate to steer you away from here, but there is a lot of good LSX swap info over here. All condensed in one thread. You might find answers to your questions there.

http://www.67-72chevytrucks.com/vboard/showthread.php?t=377348

 

[RollinKaos]

F body manifolds seem to be the fix for this with the research I have done. Even then it is a tight fit between the frame rails.