1983 k5 been hearing a clunck somewhere in the rear when i would put it in reverse , went to tow a stuck car and the rear pumpkin puked its guts out the cover. of course its a 10 bolt. what does a used 10 bolt go for from the junkyard ? what would be the options for getting a 12 or 14 bolt to swap in with no mods ? its a daily driver so gotta get the wheels turning soon. thanks in advance daimok I added pics of what was left when i pulled the pumpkin cover. This broke from daily driving , it let go right after i put it in drive. diff 1 diff 2 What do I tell the junk yard i want for years and model if i am going to go 14sf ? ( 3/4 ton 4wd ?)From the replies i have seen , i want to go the 14 bolt route , want to keep the 6 lug brakes and not modify the perches. I dont mind doing the ujoint conversion.