8 to 6 or 5 lug conversion?

[LowBurbAZ]

Just bought my inlaws 87 3/4 ton suburban and not to sure about what would need to be done to convert it to 1/2 ton bolt pattern. All the square bodies that I own have all been 4x4's. So I know what to do on those to swap from 6 to 8 lug but I'm not to sure on the 2wd models. I'm going to swap the rear end from the 14FF to a 5 or 6 lug rear end that I have laying around but I need help with the front end. I'm going to bag and body drop it. I need to know if I can get away with just swapping the ball joints, spindles, etc. Or if I have to swap from the control arms out and if I would need to make any other changes to get it to work. I just don't want to have to spend the $ on buying stuff for trial and error fitment. Any help would be appreciated.