Where are you measuring the pistons? That can make a difference. Measure the skirt (90 degrees from pin) about an inch up from the bottom of the skirt. Should measure 4.150". Bore to 4.155". I personally don't think I've ever recieved a set of Ross pistons that were off more than .0005", but that doesn't mean it can't happen. What did they bore it to if you don't mind my asking?
|