Changing my oil pump wasnt too hard, you pull the clutch and the lil gears in the way then just take the pump right out and slap a new one in. For a new cam I went with a .450

A scarey thing though is ive been through 3 oil changes now, letting it run about 10 minutes each time before I change the oil. Its still coming out glittery and my filter is still catching nasty shrapnel EVEN THOUGH I flushed the whole thing with diesel before I ever put the top end back on. The motor seems to be running fine though. Just hope the glitter and shrapnel isint sticking in any bearings or gears.