What Size Gasket Do I use

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kennygreene@peoplepc.com - 21 Jan 2007 22:22 GMT

I have a 305 thats been stroked to a 334......... the cylinder bore is
3.766(a .030 overbore) originaly 3.736........ what size gasket should
i use....... ive read alot of stuff about the size and thickness but
what size should i use and if i have to special order one, where can i
buy it...... how big of a diameter should the gasket bore be?.... the
same size as the cylinder bore or slightly bigger????? HELP PLEASE

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51_racing - 22 Jan 2007 15:09 GMT

> I have a 305 thats been stroked to a 334......... the cylinder bore is
> 3.766(a .030 overbore) originaly 3.736........ what size gasket should
> i use....... ive read alot of stuff about the size and thickness but
> what size should i use and if i have to special order one, where can i
> buy it...... how big of a diameter should the gasket bore be?.... the
> same size as the cylinder bore or slightly bigger????? HELP PLEASE

A basic 4.100 bore gasket that comes in the standard 350 rebuild gasket
set is what most people use. Depending on the use for the motor, you can
buy a set specifically made for the 305 bore but I've only seen them
through GM performance parts. You aren't losing much in terms in
compression and probably isn't worth the extra expense. If you're
looking to maximize your compression ratio, you could run steel shim
gaskets (.015" thickness) instead of standard thickness (.041").

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