FWIW, I use 002/003 SS springs QA-1 single adjustable shocks and no snubber in the rear.

Up front is all stock except the usual '73 & up disc brake swap, CE shocks set to 90/10, /6 bars and about 5" of travel.

Been 1.38's in the 60' and still tuning

Never had an issue with the car not going straight & true. If you do then you need to start measuring the car.