Thread: 327 sj for a 78 nova

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GM 10105117 this gasket has a 4.00" bore will it still fit a 4.030 cylinder, or does that matter?

Originally Posted by bluepyro

GM 10105117 this gasket has a 4.00" bore will it still fit a 4.030 cylinder, or does that matter?

GM says it will work fine in a +0.030" motor. That's according to the forum at Scoggin-Dickey Chevrolet.

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also which rpm intake should I get for this combination
and which set of 1 5/8" long tube headers should I get? thanks for the help guys without youi would be running in circles and getting nowhere.

Originally Posted by bluepyro

also which rpm intake should I get for this combination
and which set of 1 5/8" long tube headers should I get? thanks for the help guys without youi would be running in circles and getting nowhere.

Edelbrock #7101 for conventional Gen I heads mounting a square-bore carburetor. The very same manifold can be had under Holley part #300-36 and Weiand 8016. Neither of those manifolds is being made any longer, but many times they come up on ebay or craigslist.
Edelbrock #7104 for conventional Gen I heads mounting a spread-bore carburetor such as a Rochester Quadrajet.
Edelbrock #7116 for Vortec heads mounting a square-bore carburetor. Counsel with head supplier, find out whether the heads take a Vortec intake or a conventional intake.

Concerning headers, you want a quality set of long-tube headers. Not shortys. Look for 1 5/8" primary tube size and a 3/8" thick flange. Thinner flanges will curl up from the heat and spit the gasket out. It's up to you whether you want them painted or coated with Jet-Hot or some other protective coating.

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