I run 88mm Forged pistons with a 110 engle cam , the 88's are slip in, I haven't had any trouble ,butttt ,I think I am extremly lucky , I also change my oil almost after every trip , 200 miles or more, Bob says that his theory is that the folks break the bottom of the skirts as their installing them , butttt, I know I wouldn't have used 88's if I had read all the horror stories first. 1776 is what I 'll probably do next , with straight cut cam gear , . Good luck , 88's or rearist of the rare at most shops