1pete1 Look at your timing system are advance weights sticky? initial timing set right,TDC mark in the right place,does it smoke black when it does fire-up,carb insulation might help (thick gasket),is it carboned-up,slap a double handful of ice on the fuel pump if its in the open might tell you something,starter bushings well worn can let the armerature bow enough to rub on the fields in a hard cranker,if the valve guides are alittle tight mighthurt hot starting ! Good Luck with your hunt !!