Next steps for more power - 318

Jeff, you can try what I'm doing with our teen...

I got a set of 67 -920 heads with smaller chambers and the .040" fel pro gaskets. The heads have been ported and 360 valves were installed. This will bring our compression up to 8.3 in a stock 72 block...

The 66 - 67 273 heads will have the smallest combustion chambers and still have the standard intake bolt pattern...





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