I'm putting my new motor together and have a few ???'s about the damper. Can I install it by using the bolt that holds it to the crankshaft? Can I just use an impact driver to drive the damper on or should I go get a harmonic balancer installation tool? Also, regarding the timing tabs. GM supplied two with my new motor. I assume they are for two different size dampers. I've figured out which one to use, but when installed and I have the TDC mark on the damper and timing tab lined up, TDC is at about 2 o'clock. On my old motor, the timing tab was spot welded to the timing cover, and TDC is closer to 12 o'clock. It looks like I would have been pretty f*cked up if I had re-used my old damper. What gives? I know these are probably dumb questions, but like I learned in boot camp, the only stupid question is the one not asked. (that's what they SAY, but God forbid you should open your mouth and ask a truly stupid question. That will earn you a trip to the quarterdeck, fo' sho'! /forums/images/graemlins/eek.gif) I also got two little steel dowel pins with the motor. They are about 3/8" long and two different diaeters. One is 3/8" and the other 5/16" (I think, I'll measure them with my mike when I get back downstairs) WTF are these for? I love the one sheet of instructions they give you too, all full of misspelled words. Well, the motor was hecho en Mexico.... Please be prepared for more questions as I finish doing my first engine swap in these next few days.