SB vs BB who wins?

Newbomb Turk said
Why handicap the SB with a 4 inch arm? I‘d build a 3.79 stroke (or maybe even a 3.65 stroke because I think they used to make that stroke length) and turn the small block 7500 rpm

Well, I was assuming 4" was tha max, anything under that was allowed, but this ain't my game and my rules.