what pt. # manifolds can i use on my 67 327/275? i think corvette had 2 1/2" manif. exits. will exh. pipes be a problem? any info will be appreciated. have 2 1/2" flowmaster crossflow muffler on now.
From all accounts I've read, the corvette 2.5" "Rams Horn" exhaust manifolds won't work -- they dump the exhaust right into the crossmember (but they flow really good...)
I think Sanderson makes some cast manifolds/headers that might work, but last time I was looking at them, I thought they were pretty pricey. I haven't looked in quite some time tho.