leave the block stock for now. do you have a car to drive while you are building the motor? if you do, then cool. but you will build a different block for turbo vs NA. if you want an NA you will use different pistons and compression. then you would want to do a different head package to. like i said, if you want to build a real motor, get a BARE SHORTBLOCK, put it on an engine stand, and build it piece by piece when you get your plans in order.
that way you don't have it done half ass. you won't have turbo pistons in a motor without a turbo or have NA pistons when you get ready to turbo it.
