Factory ride height

I am in the process of redoing all of my susspension in my 1970 Dart Swinger. I am buying PST 1.03 torsion bars and new rear leaf springs. I was planning on a 2" drop in the rear but looked under and noticed the factory exhaust hung quite low. I am lowering the front end as well, to get that good stance. Long winded way of trying to get the factory ride height/clearance for the front and rear suspension. Thanks