I had the same problem with my 72. The front end was so shot, and so low because of it, I had to add air shocks to the rear to help it out a bit. I couldn't go thru a drive thru car wash without the sub frame hanging up on the guide rail. LOL
Which is one reason the car is tore down now.
67 RS 327, 4-speed, posi, done.
67 Modified, 454, TH-400, posi, under construction.
67 SS 396, 4-speed, basket case.
72 RS, sitting, partially done.
55 210 post, 2 door, 327 4-speed runs good.
55 2 door post, gasser project
69 Cadillac ElDorado
69 4x4 suburban
Some mornings, it's just not worth chewing thru the leather straps"