Springs in this car are flat as it sits ,,,,notice the rear shackle
. And the label was still on them
Ive thought about the coil overs. Just concerned is getting it to high.
If you were at the 'stock' ride height, I would share your concern. But as much as it's sagging, I don't think you'd have a problem. The NAPA units are rated for only 1,100 lbs of additional support so I can't believe that you'd be in the air. The saving grace is that with either the coilovers or the air shocks, the upper shock mount on the '66-'67 is substantial so I doubt that the upper mount would be coming through the floor.
