With that much negative caster, I would expect steering to be very easy and also the car would tend to wander around. Not stable.

If specs are reversed and it is 3 degrees positive caster, that is a lot for manual steering. Steering would be heavy. Problem solvers could get you to 3 degrees positive. If you back off to 1 degree or less positive caster and dial in some negative camber (around -.5 deg), it should steer easier/better. I'd try first to get alignment set with all parts as installed. You may well get there without changing anything except alignment cam settings.