"change both wheels",is the rear mag too,if so, is the engine prefix indeed T140D?,thats a really good score, D's had megacycle cams,none of that sissy pollution (pre carbon tax)camshafts the rest got
,your tappet (exhaust moreso) clearances accordingly are larger settings too,they rev
,i used to assemble them from the crate bitd,best model,
ps they're morris mags,worth hanging onto mate!!