at 120 lbs over the nose with factory rate springs, I would guestimate your car is sitting roughly 3/4 to a full inch lower than it was.
With the motion ratio of an F-body front suspension being nominally 2:1, a half inch spacer would lift the car between 3/4 to 1" from where it currently sits.
__________________
-Jason
1969 Pontiac Firebird
|