i think ppl have missed something here.
bertil fox at his all time best wouldnt stand a chance vs phil in contest shape.
not in a single pose.
Fox had great chest and arms
Besides conditioning, he lacked back, legs, was also not very wide, which his huge traps and pecs made look even narrower
Back then, guys lacked hams, backs were not as good (with exceptions), delts were much smaller
But... Better question, IMO, would be: how would Heath do in Fox's day ? Sans slin, gh, and other exotic stuff. I think Heath wouldn't turn pro