Pistons a little help

[Raptor]

The control ring is supposed to run a little big, it is directional as well. There are pretty specific details on how to install it. From the PM I got from you, it sounds like your block isn't back yet, you should wait till after your block is back before you assemble the pistons anyway. Always double check the machine shops math by checking your own piston to wall clearance as well as ring end gap, even on the cast pistons with the topline kit. You can't really do that correctly with the pistons assembled already.