I did a few of those rear end swaps like your stating. Its a good deal to do. That is a corparate 10 bolt 30 slpine in the 1/2 ton 6 lugs. What we did was got a 3/4 rear with 6 lugs, (dont have to change rims) 9 1/2 ring gear semi-float axle. That being a 1 ton is most likly a corp 14 bolt w/ full float axles. Make sure that you measure the spring perches, might have to relocate them.