Thread: 454 Head Intake Mismatch

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I have a 454 from a 72 Corvette. I have never rebuilt an engine. Forgive my stupidity, but why does this intake not match up with the heads? See the pics.

The heads were given to me but I don't know the brand.

Intake 1.jpgIntake 2.jpg

I'm no expert, but from your pictures it appears you're trying to put a small block manifold on a big block. Others with more expertise than I should be able to reply with a better answer.

Also no BBC expert but do you have Rectangular Port heads with a Oval Port intake? A Rectangular Port Intake can fit on either type head and seal, but an Oval Port Intake cannot - it leaves part of the ports exposed. Google the gaskets and compare the top of port relative to the bolt holes.

Welcome to CHR - no dumb questions here. We're all still learning at some level.

Looks like you have a 7561 manifold (number cast on the right rear of the manifold) - for oval ports. You need a 7562 for rectangular ports.