4wd cars...

I am just throwing my opinions out here and this may or may not be the best ideas, but I agree that the torsion bar won't do well with any type of "lift" greater than maybe 2-3". Your other options, before dropping another frame on top, would be to look into a gasser style set up? Aka, solid bar and front leafs etc...mopar a body gasser.jpg
but it can be questionable how well this set up can hold up to the abuse of offroading and overlanding, depending on how hard you drive it (Some older 2wd Jeeps have pretty nice looking front axles in the junkyards and look beefier than this pic and would retain 5x4.5 bolt pattern and front disks depending on the year!). Under the same idea you can find a solid axle with bigger knuckles to do it safer but then you would be carrying that front pumpkin around for no reason as i assume you will be keeping it 2wd.
Next option would be to look into splicing in the front part of a frame of a later model ram or dakota that has independent suspension (if you are dead set on that) so that you can find a "lift kit" that fits those models. This wont be easy and it wont be cheap though.
Last option is the ugliest but might work is to jack up the torsion bars as high as they will go, run pizza cutters on wheels that push the tire as far away from the body as possible, then trim the fenders as needed baja style.
Either way, this is hot rodding, all that matters is that if you really want this done, get it done by any means necessary and post lots of pics so that we can all enjoy your build... Good Luck!