That is perfectly fine. You might end up having to re-clock the torsion bars to get the lift you want, but otherwise, it should work just fine. One thing that I noted when running cranked torsion bars paired with aftermarket rear springs, was that even though the ride was what I wanted with a lighter front end, the pairing of a lot of rear weight with not much front weight became pretty obvious when I was on the brakes hard. The nose tended to dive a good bit as the higher spring rate in the rear merrily shifted all of that weight forward onto the woefully unprepared factory t-bars. It wasn't obnoxious, but it was worth noting. Since you are going light front and rear, I wouldn't worry about it.
