It's not that I don't believe you, but I haven't seen anyone so far who's stronger with a smaller stance, say more narrow than someones schoulders. There's a good reason why you see wide stances all the time on any powerlift meet.
Agreed for powerlifting - bar down the back - heels raised - wide stance - back tilt forward - all advantageous Biomechanics to lift heavier weights.
My comments were directed in a bodybuilding sense.
For greater leg stimulation - and less low back involvement.
as for the wider stance - i was meaning a inch or 2 either side.
Then again - with his heels on a block it could be a lack of flexibility in
His hamstrings / calves / Achilles' tendon / tight quads.
Making him tip forward.
As stated previously Good on him for doing what he's doing & enjoying it.
Long may he continue.