Cash,Heads yes,cam and lifters,no.It will kill the potential gains that you'd get from the additional cubes to the point of being a waste of money.The stock exhaust will simularaly limiting,although not as much as the cam.The intake and carbs will be fine.[may need minor jetting changes].The good news is that other than a little clarencing for the 4 inch stroked crank and the longer rods.your engine is so fresh that it shouldn't need any machine work,your existing oil pump will be fine.I'd drop the compression to 10.5 ,and if you're running the 62 dual point distributer,change it to a 63-65 vacuum advance unit.A gasket set and a stroker kit[crank,rods,pistons,have that assembly balanced] and a cam change would be the minimum needed.