Yet another S.S. spring question

As some of you know i'm gonna be putting a 383 in my Duster,i seen in the other thread that it raises the rear about 2 inches.So my question is with the big-block and the rear lifted a little will it make the car nose heavy?I'm gonna be running .920 torsion bars.
Also in the other thread there was a problem with the shackles being at a weird angle,will i have this problem also?I'm NOT moving the springs inboard.