I have a 1973 cadillac heasrt, I'm trying to 4x4 it. I was told that a subarban frame would work. Can anybody help me this is my first project of this kind. I am looking for any kind of help I can get.
Thx. Phx99

 

The presidential limos are so armoured and heavy the all run on GMC chassis so the Suburbans will no doubt work for you.

 

IMO, no trying .. it is doable !
you may even find a salvage 4x4 Suburban with its 4x4 system in place.

then toss in a lift kit and some 36 inchers and she is gonna rock.
if you want more wheeling serious, look for dana 60 axles and 40 inchers

what are you using for the engine? maybe a 500 be nice?
can we get a picture?

wow, a '73 Cadillac Hearst on 4x4 ... i like it !