Engine Builders - Hyper Piston Question

My fresh block got a couple long, vertical scratches in a couple cylinders. Apparently the oil expanders are wrong. Of course I didn't catch it until I knocked a couple pistons in & they were too tight. Everything looked good but the oil expanders don't even fit the bore nevermind the piston.

My question is, what could a get away with for side clearance with KB hypers in a race only 451? Right now 4-5 thou. If I honed it to 7-8 thou to try & clear up the scratches in those two cylinders am I asking for issues? Or should I just slam it together & see if how it leak downs. Going to order a new set of rings.

On a budget of course or I'd just prep a spare block. Bought the shortblock on a deal & luckily tore it down to verify everything.