Reinforce your rails while it’s apart 40x25 angle 3 to 5mm thick weld it in , grind your engine mount nuts off and re attach to angle , , for the cost of less than $100 replace all bearings and both corks , clutch and drive , am just doing a 20” twin myself at moment , just about ready for paint . As for catcher you can buy new period correct catchers from a bloke on Facebook “ old time parts “ his catchers are magnificent great workmanship