Going to see an 81 K5 this weekend. It hasn't been on the road in several years. Appears to be stock from the pictures except for the wheels/tires. I'll search all of the normal items before any purchase; rust, driveline, any wreck damage, see what's missing... For this truck I assume it would be a 350 with a TH350? Would the transfer case be a NP205? Did they use other combinations in these? I'm sure I'll have to go through everything to make it road worthy. Any big items that should make me walk away? Thanks.