Dam, You give up two easy(LOL)I had that crazy idea years ago.
I bought an old Schwinn Heavi Duty frame, flat-plate OCCC Happy Time mounts and two HT engines. At that time, SBP shift kits weren't made, and I ash-canned the projects.
Might try it again.
It was the two clutch levers, two brake levers and two throttle levers ANNND the engines' width that stymied me.Dam, You give up two easy(LOL)