302 casting small block heads

If anyone is looking for compression...know that switching to 302 heads as cast will be a trade in flow for 4-8cc smaller chamber.

If you have the 675 castings those are usually 68cc. and milling roughly .023 will yield a 64cc chamber after a deshroud cut. If you have later 70's, those are 72cc like most 360 heads and will need about .045 milled to be 64cc.