Torsion bar/K frame question

a-body torsion bars are a-body torsion bars just different diameters for different rates. Putting disc brakes on it is a damn good idea. Trouble is the large bolt pattern stuff, think later cars, is A LOT cheaper than the small bolt pattern stuff.....If you go with the lbp stuff you will need to change the rears as well, unless you are not going to carry a spare tire then who cares? Firmfeel sells re-enforcing plates for the lower control arms that might not be a bad idea, as well as finish welding up the k-frame.....again dependent on what you are doing....