Will an entire G1 drivetrain from a 69' SB pickup, fit on an 85' Blazer frame?

[diggy]

Will an entire G1 drivetrain from a 69' SB pickup, fit on an 85' Blazer frame?

69'

FRT = D44 with crossover steering, 2.5" Tuff Country EZ ride springs, and a zero rate
RR = 12 bolt with 4' shackle flip, 2.5" Tuff Country EZ ride springs....the rear custom bumper weighted down this set-up, so it has roughly an even stance

350 SBC, 700R4, 203/205 doubler with triple stick All ORD components


85'

stock 10bolt FRT & RR
stock 305, 700R4, 208

I want to use any and all 69' components possible. Will they cross over or will there be any modifications needed to the 85'?

....i.e.

can I use the 69" shackle flip?

exhaust clearance? custom 69' exhaust will used if possible

crossmembers needed? can 69' x-members for tranny and tx-case cross over?

do I need to relocation of any axle/shock mounts?

triple stick position in hump? any special consideration?

is a body lift needed?

any other issues I am forgeting?

do I need any other parts for this swap?