Here Is the magic to your answer:
1968 9.2:1 cr 230 hp 318, just for starters. Stock in 1968.
If your valves have not pounded into the 645 open chamber heads with the non hardened seats, then would say the 340 cam will round it out nice.
If the heads are compromised, then upgrade to the 302 closed chamber heads and pick up another 1/2 of a point of compression ratio, and can also go with the thin Mr. Gasket 1121G .028 ths thin head gaskets for even more on the compression ratio bump.
Getting in the area of 9.5:1 cr now. Next add a LD4B 318 aluminum intake manifold and a 1406 Edelbrock carb.
300 + hp here we go.
Don't forget the 2 1/2" full exhaust all the way out the back.
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1968 9.2:1 cr factory stock pistons with the light free floating rods.
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782 light weight free floating rods on the left. Heavy 645 rod on the right above.
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You asked for it: Here You Go!
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