3/4 to 1/2 questions

[ltitsnw]

Hello...new to the board, been searching and reading alot, this looks like the place to come for answers..........I've got a 70 GMC 3/4 ton that I want to switch over to 5 lug......I have a set of 71 spindles, can I put 1/2 ton balljoints in my arms and will 1/2 ton springs fit in the front.........Question #2.......I've heard that all 1/2 ton rearends are the same from 70-87, outside to outside, what about spring perches(leaf) center to center, and are the leafs the same lenght as the 73-87's...........Another thought I had also, what about later model 6 lug stuff fitting, rearends and front brake components........a move to late model 6 lug opens alot of wheel choices........anyone have thoughts on converting from leaf to coil on the rear???.........Thanks Troy