could not find this on here, what is the difference between a 1/2 ton and 3/4 ton 10 bolt front axle housing? I bought a truck (79 1/2 ton Chevy) with the original axles swapped out for what I was told were 3/4 ton, the rear is a 14bolt FF and the front is a 10 bolt. The person I purchased this from turns out was not the one who build this truck so he doesn't know alot about it so I'm trying to figure out what I have here, thanks.