What is the cheapest way to put about 4" or 6" lift on an 84 Fullsize Bronco?

4" with no extended radius arms (drop brackets instead) with rear blocks, probably run you at least a grand. 6" same deal, about 1200. or you could do a 3" body ~200$ and cut the fenders. This is all if you do the work yourself.

ya, Phillip is right, been looking at these lifts for my truck (96f150). bottom of the barrel lift, just to get it in the air will be about a grand, and you'll have allignment problems as well because of the TTB.
swap in a solid coil spring D44 from a 78-79 bronco, and use a lift from a 78-79. can be done, and is probably what i'll do when i;'m outa school

I fit 38.5x11x15 boggers on with no lift and lots fender cutting thing was stable as hell then i added extended radius arms only to get more travel out of the ttb.Cost=$20 worth of sawzall cutting blades!!

Did my Exploder with a Superlift 5.5", about $1300, that was with the drop brackets, longer coils, drop pitman, shocks, brake lines, sway bar extentions / drop bracket and spring over in the rear. Plus an alignment. And steering stabilizer, $130.

Rides nice, 10,000km so far and about 1/2 dozen offroad trips, no alignment issues... Flex? Kinda!
.

go buy yourself a set of 1 ton springs

Sell the 84 and get a 78/79.... WAY cheaper to lift.

I had a 81 that i got a 6" on.. and it was STUPID how expencive it was...

Deej