I had a '39 Chev. 216 pressure drilled and macined for insert rods. Ran great and I turned it over 5000 RPM often, it never had lower end problems. The early 235's up to '53 look just like 216's, tall side cover and all, so that should be no problem, just put a later oil pump and drilled crank and it works fine and nobody will know except for the numbers on the block.
