early 273 pistons.

nm9stheham said
Interesting this thread should pop up again, because one member here reported some early 318 pistons that were close below the deck, rather than the more common .080" to .100" in the hole. So the early 318's were better CR too. I gotta suspect the changes top lower CR after 1970/71 all had to emissions.
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the 68 318 seemed to have the highest rated HP but looking at part numbers didnt seem to denote any changes in pistons. probably year to year testing got lower and lower results with more **** having to be hooked up and camshaft changed for emissions.