Well, earlier today I stumbled upon a 12 bolt rear out of a late 70's K5 for sale for only $100! Looks to be in pretty decent shape as well! I believe it does has the "gov-lock" dif, but im planning on putting a good eaton or auburn differential in it along with moser axles. I want to build this rear end, paint it, and have it totally ready to go before I put it in the truck. My current 10 bolt has an open dif and I really dont trust it with the 400 horse small block im currently building for my K5. I know 10 bolts can be built to withstand a lot of abuse, but I'd honestly rather start with a bigger and probably better platform. plus the bigger pumpkin looks pretty sweet..... And for $100, I feel like I can't lose. My question is, is there anything i need to look for on this axle? And have any of you ever had the axle tubes stretched on one of these trucks? The rear axle being narrower than the front has always driven me nuts.... Is there any real benefit to having it narrower? And laugh at me if you want but this truck is being built as a cruiser / hot rod styled / modernized 80's / basic white girl jeep / mall crawler..... As strange as that may sound I will eventually start a build thread! Thanks!