Barracuda sag

I have a 69 notchback that a title body work turned into a major deal. One thing leads to another. Anyway I put the car on jack stands under the axles and LCAs then installed frame connectors. I am moving onto relocating the springs. While moving the jack stands to under the frame connectors and frame at rear valance I noticed a lot of body movement as I lower the rear. With the car on frame connector stands and lowered the rear axle with no jack stands at rear body seem to sag about an inch when jack was taken off the differential. Does that seem normal to have the body move roughly an inch? I looked at door gaps and nothing seemed out of the normal.