Given the wear on the skirts you will likely find the bores are tapered and oval and need to be oversized to get back into spec. Even on a well-maintained high mileage redblock you would expect this, I don't think I've even once measured an original block and found everything to be in spec.
I agree with @Massey165, it's an own-goal to put your motor back together knowing your clearances are out, and you don't want to machine your bores only to run a sloppy crank, as you might end up having to run a heavier oil to account for the excess clearance on the crank journals, which will in turn accelerate wear on the fresh bores and pistons where the clearances are tighter.
