2 hours ago, Erik Marquez said: The marks are off slightly because the cam chain is worn somewhat. Its like that on EVERY motor that has a used cam chain, more so on one that uses the ACCT. Im sure Im off, but, just to be sure... you did not loosen those cam sprocket bolts to "adjust" timing right? That is an older set of cams to have adjustable sprockets... Look at the left ex valve follower (the bucket) is it scratched and dinged up where the decomp pin presses against it? If you can not find the issue...... Id suggest investing in a head gasket, pull the head, check for contact of valve to piston closely, measure installed valve height, check the shim thickness and look at the underside of the followers to see if you can find evidence of contact between the spring tops and follower. I did not touch either bolt the holds the cam gear to the cam shaft. I’ll check those other things as you mentioned, but that might be a little bit over my head. I’m an optimistic person, but this ordeal is getting the best of me. I’m running out of things to check.