Hi again, Ok, this time we are working on a 1996 Phase 1 engine with lifters in the heads. We redid the heads but used the original lifters. Put the engine back together and the driver side head is ticking. Ran the car for 20 minutes...still ticking. The passenger side is quite and running great. What did we do wrong? Any suggestions on how to fix the ticking (besides putting in new lifters )? Thanks!