Jerry, a Mk8 Pursang swingarm I have, measures 180mm from shock bolt centre to shortest axle position centre.
Or, 290mm from shock bolt centre to front edge of swingarm, 215mm to back edge of swingarm.
Mk7 Pursang is 115mm from back edge of swingarm to shock bolt centre.
Good to talk to you (yet another Bully fan) on the phone.
Mike