- Nov 12, 2006
O.K. I am getting worried now. I am being told by a machine shop that my pistons are stock size pistons. The guy even measured one in front of me today. Now I actually didn't look right at it to see the measurement myself but I got the part # off of one of the pistons and they are Ford E7ZE-CA. So I call Ford and they tell me those pistons are actually .040 oversize for a 87 5.0 HO. Now I have a 89 no big deal but how in the **** is it the part # matches .040 and the machine shop says they are stock. Is somebody full of it or am I loseing it.