The 300 heads will lower your compression to about 8.00 : 1, fine if you are
running a supercharger or only have 82 octane gas to burn. They also have a
larger combustion chamber diameter than the 215 block, introducing a "step"
which will defeat an otherwise well designed combustion chamber.
Unless you are boring & sleeving the engine to 5.0 L, sell the heads to
someone who is, or save them for your future 5.0L project.
Jim Stuart
William Elliott wrote:
> Hi!
>
> I'm rebuilding a 1963 high compression 4bbl Buick 215. I have the
> opportunity to get a set of fresh, ready-to-go Buick 300 heads for $300.
>
> I've heard this is a bad idea... and I've heard it's a great one... what
> are the pros and cons? I figure it will cost me about the same to go
> thru the stock heads.
>
> Thanks!
>
> Bill Elliott
> Lake Mills, WI
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