Slant Six / Carter BBS Heat Soak
back in the '70's when i was about 12 my grandmom got a new dodge demon :D
slant 6
it never had problems starting when it was warmed up. of course the gas is supposedly bad nowadays, but i hardly think it would cause this bad of a problem.
i also dont think a hack mod is necessary.
tell me the history of your carb. start to finish. where did the carb come from. what has been done to it. etc.