I'm rebuilding a 383 for street&strip use and had the block .030 overbored at our local machining shop.

The block was bored with deck plates to ensure better roundness of cylinders and I had the KB400 pistons at the shop to match the piston to wall clearance according to the piston manufacturer's recommendations. I also had the rings there for matching the honing finish for using a moly piston ring set.

After I got the block back from the shop I was astonished by the very rough cylinder surfaces. I have rebuild several engines over the years but this time the cylinder were rougher than ever before. If I have understood correctly different honing procedures are much depending upon ring material, ring tension, blockmaterial and also application.

Does anyone have recommendations on hone type and the grit for this type of application I have?

If the block was bored with deck plates, how much there can be cylinder bore out-of-round when the deck plates or heads are removed?