Thanks for the reply I have looked at the ec and arc rods and mine are definitely stock it?s kind of crazy someone put a prescion cheetah cam and ec roller rockers and arc aluminum fly wheel on this motor but left the stock connecting rods I got the whole set up second hand I took the motor apart because the key way bent and fell on on the fly wheel so I thought I had blown it up because I lost a cylinder due to that and decided to freshen it up while it was apart