new 502 block?'s

So I purchased a brand new Gmpp Gen 6 502 block. I bought it from a private owner, new in the crate. My plan is to add a 4.250 stroke crank and leave the bore standard. This is the revised Gen 6 with the mechanical fuel pump boss, revised oiling and main bearing bulkheads. Does anyone know if these blocks are rough bored and need to be just honed to the piston. It has freeze plugs and cam bearings in it but no oil gallery plugs. I'm curious how much prep work is needed to run this block. Thanks for the info