ARP mainstud kit for LA !!!!

On this particular block, I measured the the bore diameter across the bore between the head bolts as it was with no torque plate, and after torquing the plate down with a cometic gasket, remeasured and it distorted the bore exactly .0008, so 2 tenths less than a full one thousandth out of round. 3 or 4 easy passes with the hone showed obvious shadowing where the ring seal wasn't consistent. Not all blocks move this much, I have seen a few where the plate made no measurable difference. You just never know unless you check.