Pulled rocker covers everything looks as it should on top of heads. Nothing rubbing, never made any valve noise - so this makes sense. I'll pull timing gears off today. Joe - does your dad know much about pontiacs? Lol... Thanks for your ideas on this. My copy of your dads book is well worn. Answers to couple of your comments: squeal happens without either belt installed. Some thrust plates are bronze on after market timing kits, can't recall mine but I think mine was not. Distributor is MSD. they might have bronze? Sounds like the Ford referenced above did. But I pulled distributor and looks good although I didn't pull shaft to examine upper bushing. There is no play in it. Several people with roller cam use a bronze distributor gear, mine is composite. Yes, I pried hard on crank to plunge back, used clutch to plunge fwd. Yes, I have windage tray. It interfered at first on dyno but reshaped it in dyno shop to clear. I had oil pan off after about 800 miles to fix oil leak, and windage tray looked good. Motor has been driven spirited for 2100 miles, not just dyno. No shavings when pan pulled at 800.