ok guys...I find all kinds of kits to swap 1/2 ton brakes, but nothing for 3/4 tons? I know guys do it, so are they just using the 1/2 ton kits? Also, which is easier..swapping gears out of the rear end on a 4 spd with granny gears or swapping the whole axle out? Currently running a 63 230 w 4 spd granny and am thinking of switching to a 350/350 combo. I'm sure some of you have done it, how bad is it to do? Thanks