Amongst a few other things I did to the truck this week, I swapped in HEI The damn timing cover doesn't have a tab on the timing cover and my t/light is becoming somewhat erra raa rraa ttt tic. (Besides acuating randomly, its showing my timing mark at about the 9 to 10 o'clock position ). Anybody know how to accurately tune timing minus these two items? P.S. Esteban if you read this, thanks for the info the other day, I understand now what you were saying about the disc/hub balance problem. P.P.S. I went out...pulled the pads and ground'em flat. Unfortunately the only guarantee that comes from the place I can get chev pads is "yep, there the ones!"