Mike, you are treading on ground that has a lot of unknowns. I assume the car was sitting up in front with the 326? How bad are the rear springs? Could they be causing the nose up attitude you are describing? Rebuilding the front end can also cause changes in ride height. Generally higher

. I would talk to somebody who does this on a daily basis for advice. 3 springs wound to the same unladen height from different stock will settle to different heights when installed and loaded. Don't guess.
__________________

frittering and wasting the hours in an off hand way....
1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core.