So in my dealings I ended up with an 85 k5 that is unsmogable in California but has a clean body/frame.
It already has a 4" lift and 35" tires.
Axles are geared insanely tall at 2.73:1
At this point I sold the engine and used the transmission as a core.
I am going to build my suburban with a bbc and I can use the 89 5.7tbi and 700r4 that is in it now in this k5.
The plan, if I proceed with it, is to make it running, take it to moab and have fun in it then come back here and sell it to help fund the suburban build.
It will get a new tag after a referee checks it and it will be an 89 level smog.