Sorry if you posted before that adjustable CA but i miss a lot of detail due to being on my iPhone.
I adjusted mine to 6.5 for factory spec but it was horrible. I read IRO manual for long arms and re adjusted to 4.5 and eventually settled on 4
More caster will bring the steering wheel back to center faster than less castor, I have heard most dodges solid axle front eventually suffer DW and same with factory WJs with no lift but worn out steering components.
Just letting you know what worked for me but seem that everyone has different results on different jeeps. I wouldn't worry about pinion angle as much as I would for caster.
DL vibes can be cured with a double Cardon if you end up with that happening
99 Grand, 37" and mostly factory - Raised tank and trimmed fenders etc