Question on ride height

I want to raise the ride height on the front of my 73 dart sport. I’ve taken it to alignment shops to have the torsion bars adjusted. Afterwards the car looks great and is fine for a short time, but always ends up effecting the toe/camber and has to be adjusted back down. I’d like to raise the ride height up about 2 inches. Is there any other way to do this other than adjusting the torsion bars, or is there a secret to torsion bar adjustment?