I don't see over tightened u-bolts as being a likely or even possible cause.
A 5" increase in ride height is pretty huge. What springs did you use? Super stocks? Did you tighten the pivot and shackle bushing nuts with weight on the wheels or the suspension hanging? It's best to tighten these with the weight on the wheels so the bushings don't take an excessive static torsional load. Expect the rear to settle a bit, especially if the bushing nuts were tightened with the wheels hanging.
You can raise the front easily enough by tightening the torsion bar adjusters (this you should do with the wheels hanging). Keep in mind that the camber will change as you raise ride height, and as stated above, you'll run out of adjustment on the UCA cams before the arms touch the rebound bumper. So, unless you car was set really low, you'll have trouble raising the front 5" and while keeping camber within spec.
