I really beg to differ there is no way a std 2bbl 265 would get near a 340 any day at any speed, , ..that's just delusional.the hemi 265 in std form ( not six pack )...is 203 hp , and even a good one(six pack) is lucky to pump 300hp...
they are a rattly antiquated horrible 6 cyl, they were designed and developed in the usa as a replacement for the rg series engine( slant 6)the americans couldn't fix the inherent camshaft , oil pump, harmonics and ignition probs( the first hemi6 with the centre mounted distributor) and gave the idea away,,,and went back to the slant...unfortunately we aussies were then cursed for 10 years from 1970 to 1981 ..til they finally killed the rotten things.