Exhaust Manifold ID

[David L.]

I'm getting ready for the Winter Regional next week and found a left exhaust manifold I believe to be pt # 3749965 with a date code A1063. It also looks like it might be 3749865. I can't find a reference to 3749865. Can anyone help with this? Could it be 9865 instead of 9965.
If it is 9965, I believe it is for a 1963 250 or 300 hp with powerglide? Thanks and see you at Kissimmee. I'll be setup in space # 300 and plan to meet at the Blue Max at 1:30 Friday and maybe Thursday.

David # 5133

[David L.]

Re: Exhaust Manifold ID

Thought I'd bump this up for one more try at getting a reply.

David

[Joe L.]

Re: Exhaust Manifold ID

I'm getting ready for the Winter Regional next week and found a left exhaust manifold I believe to be pt # 3749965 with a date code A1063. It also looks like it might be 3749865. I can't find a reference to 3749865. Can anyone help with this? Could it be 9865 instead of 9965.
If it is 9965, I believe it is for a 1963 250 or 300 hp with powerglide? Thanks and see you at Kissimmee. I'll be setup in space # 300 and plan to meet at the Blue Max at 1:30 Friday and maybe Thursday.

David # 5133

David-----


It could not possibly be a manifold of casting number 3749865. That's because GM #3749865 was a throttle valve rod assembly used for 1958 passenger cars and Corvettes with Powerglide.

If the manifold you have is a 2" straight outlet, ram's horn with generator bracket, I'm VERY confident it's a GM casting #3749965, first used for the 1958 model year.

[David L.]

Re: Exhaust Manifold ID

Thanks Joe! The manifold is as you described so it's has to be a 3749965. Must be these old eyes playing tricks on me.

David