Hello all, I have just purchased a 93 80 series, and have a couple of questions. After lurking around here for a few days, I've noticed the 4.5s seem to have some issues with headgaskets. The truck I just got has a busted piston skirt (ran with no oil), and needs a motor, I have one at the shop that supposedly only has 40k mi on it, and I'm wondering if it makes sense to go ahead and put a headgasket on it while its out of the truck, or leave it be. My other question, is there anything besides the usuall water pump, thermostat, rear main ect that I should be doing to this motor before it goes in? I have 10 years in the automotive field, done plenty of 3.0 v6s, but this is my first 4.5. Thanks in advance, James.