Up date. The 302 is purring. New wires, coil, spark plugs. Had fire on 3 plugs...wow. The older guy I bought the truck from had told me he had put new plugs in it. New to the truck maybe...lol..He even had the boxes, very clean looking plugs, may have put them through the dish washer. Lol. Put new pugs in and wires and runs nice. Now with snow on there seems to be some slippage. First set of rear ends are not spinning. Pulled out the axles and they seem fine. Could their be a problem with the crown or would it be transfer case. The older guy said he had broke and axle, the long axle. He just put another axle but I don't think he checked pinion, when replacing axle.