LS1 Motor mount problem

[super fred]

I put a 5.3 LS1 in my 1966 c10 using CPP engine mounts. The problem that I am having is the exhaust manifolds are hitting them. The manifolds are rear dump but they hit on the first 2 cylinders. Has anyone had this problem? What kind of headers could I use to get around this problem? Thanks

[burlapen]

I used ECE mounts and have two different pairs of truck manifolds that both hit the frame near the collector. I hear that trailblazer SS manifolds give much more clearance. You may want to check the LSX swap section.

[Clyde65]

I had the same issue, I used pol perches and Sanderson csls1 shortie headers, problem solved.
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[lucifer]

Originally Posted by burlapen

I used ECE mounts and have two different pairs of truck manifolds that both hit the frame near the collector. I hear that trailblazer SS manifolds give much more clearance. You may want to check the LSX swap section.

I used the SS trailblazer manifolds and they work fine. Needed a very small amount clearances in the right side near the back of engine. They are very inexpensive as well.

[luvbowties]

Originally Posted by super fred

I put a 5.3 LS1 in my 1966 c10 using CPP engine mounts. The problem that I am having is the exhaust manifolds are hitting them. The manifolds are rear dump but they hit on the first 2 cylinders. Has anyone had this problem? What kind of headers could I use to get around this problem? Thanks

I put a 6.0 from an 2003 Silverado in a '62. Pass side manifold cleared. Had to get a Camaro LS1 manifold for driver's side--it fit good. Made my own mounts to set engine high enough for low-mount ac comp to clear frame on pass side.
sam

[super fred]

Thanks for the info. I talked to a friend of mine and I think we are just going to make some stainless headers. We are going to make them like an old coupe style header. The ones that go out at an angle and have a straight pipe that all 4 cylinders go into. Has anyone made something like this before?
Pictures Please.

[Badcompany21]

I just swapped my 5.3 into my truck 64 c10 and I'm all the way back and my trans is about a half inch from the motor any ideas? It had a sbc in it before so why am I having issues?

[JJackson]

Sent measurements in to street and performance and they did a great job!