Not another 73-87 Crossmember question!

[2tontruck]

OK, ,I have done the advanced search and spent about 2hrs reading but I am still in the dark over this. Here is what I have....
1972 Suburban 1/2 ton I would like to rebuild the front end with drop spindles. I would like to get away from the design of the 72 Bushings. I have gathered is that the crossmember is the same and there is no real benefit to swapping that out but, Will the 73-87 Control arms bolt on? Is it possible to just buy those and rebuild them? I think you probably all know what I am trying to achieve. Just after all this reading I (believe it or not) am still confused.....
Thanks!