No prob. I only have internet access at work, so i won't be available over the weekends. Another side note thats vortec specific, you cannot set the ignition timing on a vortec, it it controlled thru the ECM via the crank position sensor. Thus, using a timing light to try to set the distributor correctly is useless, as turning it does not affect the ignition timing. It does, however, set the injector timing (via a setting called cam retard). The rotor button also has to point to the right plug tower in the cap when the ECM decides its time to fire that particular cylinder. Setting the rotor button is easy. You just mark the distributor base where the #1 plug tower is on the cap, set the engine to TDC, and back the rotor up to where it lines up with your mark when its dropped in. Cam retard can be a little more tricky, because to see where it is set, you will need a GM tech 2 scan tool, snap-on MODIS, or other scan tool (not code reader, big difference) capable of setting cam retard. It will have instructions to follow in the scan tool for properly setting it. It will run like crap if this setting is not within spec. If you buy a used engine, my advice is to not disturb the distributor settings. Just marking everything and "eyeballing it" will not get you close enough on these trucks.
