Camper special shortened and converted to 4x4

[Dorkfish52]

Okay questions.... I'm going to pull the inner fenders and maybe the outter fenders then install front 4x4 gear... I'm using rear hangers from a 79, I know they aren't the same as 67-72... Should work though, my question is about the steering box, I have a 4x4 steering box but in other threads I've read that they don't match up bolt hole wise... What do I need to do? Also I'm going to put the trans in, got an auto trans and 203 case out of a 79 gmc, does the trans crossmember go in the same holes as a 2wd? Is it that easy? Or do I need to drill? And where should I drill... Also unsure about motor mounts... Do I need to just find 67-72 4x4 mounts? Or are there other options? Thanks for any help!