I am "axle dumb", so bear with me : Been needing a new rear axle for a while, thinking of going ahead and getting one while I'm not working (since it's so hard to get anywhere to get one when I am )...there is a local 4x4 salvage, the last time I talked to him he had 3/4 ton front and rear axles with or without gov locs. I know gov locs suck, but they are better than no lock at all... Someone told me if I get one with a gov loc, that I won't be able to go back in later and put a good electric or air locker in it....is this true? I'm not really looking for the guy at the junkyard to be of much help, beacause when I asked him if they were 14bolt semi float or full float, he didn't know what I was talking about . He just knew one had clips, the other didn't. Is there a type of 14 bolt FF that I need to look out for that is NOT upgradable? This guy sells his stuff in "usuable condition"...may have to get a D44 and a 14B FF and then just upgrade the internals later.