you'll have to take it to a machine shop to get the block cut out for the longer crank throws. the most any 350 block that I've heard of being cut is for a 4" stroke crank .030" over will give you a 408. but this is also if your machinist feels comfortable cutting it this far and if you trust him on your brand new block cutting it that far. as for the cam you'll have to buy a small base circle cam. you should be able to run a good bit of lift say around .555" on this motor and it would love it. throw away the intake and by you a vic jr or performer air gap. as for best crank and rods can't help you there I ran stock stuff in mine to 6.20's no problem so any aftermarket oughtta be better. good luck