I need rings for KB 215 .030 pistons..i had to tear my mill down for a cleanup after cam sh** a lifter.I dont see these at KB and the only others i seen for sale is .040.What kinda rings do i need? Engine only has 3000 on it still see the cross-hatch no ring ridge.If i go with chromoly rings will they seal with a 220-240-dingle hone?A few no nothing shade tree friends like myself said they are a bear to seal,could take along time.Basically i need to find out where to get rings,engine is a mild 451.I have read nobody likes this line of piston,i dont need to know why i done read it but these are what i got Thanks for any help!This thing is going back together next weekend!