Alright, I have an 85 3/4 ton Suburban that I want to swap axles with (front 10 bolt and rear 10 bolt to 8 lug front 10 bolt and 8 lug SF 14 bolt). Gear ratios are the same...4.10 ratio. Now the problem, I just bought a 4" Skyjacker lift. #1 - Will the lift work when I swap the axles since it's for an 88-91 1/2 ton? #2 - Will my driveshafts need to change, or just the u-joint? #3 - For the front axle...Mine is a 30 spline front, his is a 28 spline...would it be better to swap him the stuff to convert mine to 8 lug than to replace mine with his axle? #4 - Can my calipers on my 1/2 ton axle be swapped to the 3/4 ton axle? #5 - If not, will the brake lines I bought (fit 87-98 1/2 and 3/4 ton trucks) work on the 3/4 ton calipers? Thanks for the help guys! Anything else you can think of, please toss it in! Also, what needs to be swapped with him? Just rear U-bolts? P.S. The 14 bolt SF is free, a 14 bolt FF isn't. I'll do that later.