Actually, thinking about a new build on a Bonnie frame but using an SM swingarm. I see now that the Bonnie frame actually integrates the swingarm pivot into the foot peg brackets. This may lend the possibility of custom swingarm mounts that would accept a (presumably) wider SM swinger.
I'll do some measuring on my America tomorrow. The Bonnie frame just arrived tonight, but I do not have the peg brackets or a swingarm to compare -- I may need to buy one anyway.
