Well, I've had mixed results since I posted this. I installed the fan/rad and started it up and it ran great for about ten minutes before the front seal let go and oil poured all over the driveway.
I had installed the front seal from a Fel-Pro gasket set while the engine was on the stand and the front cover was off to check the timing chain set. Since I now had to replace the seal with the front on the engine and the snout of the crankshaft sticking out I ordered the Kent Moore tools for the seal and to replace the Harmonic Balancer. I also bought a new seal, the special washer for the back of the HB and a new TTY bolt, all directly from GM.
Put it all on this weekend and started it and it appears to be OK. I really wished I knew why the other one failed, I can't learn anything if I don't find the reason why. I could have installed the seal improperly, I could have damaged it while installing the harmonic balancer or it could have just been a defective seal from Fel-Pro. I guess I'll never know.
I've still got a horrible whine from the belt to address and the transmission oil cooler line has a small leak but I'll get those handled this week then it needs two new tires and I can start driving it.
BTW, after starting it I put my code reader on the vehicle and asked for all of the codes to get a list of things I may have to look at but the result was "System Pass - no codes present" WooHoo!
I've got two "Mysteries" under my hood that I'd really like you to help me with if you can. Pictures below. One is an electrical sensor of some sort near the battery, it's greay and looks like it's supposed to clip into a round hole of some sort but I can't locate the hole. The second is a small black line that could be for air or vacuum that runs down the passenger inner fender wall by the air filter housing, it's got a rubber elbow on the end but I don't know where to plug it.
Thanks
Jeff