ok.
just so you know what I run...
lakewood 90/10s up front 50/50s in the rear (CE 3 way adjustables)
trick springs up front cut to the desired length
normal 8 cyl springs in the rear.
i've gotten consistent 1.39, 1.40 60' times with this combo.

i've got CE lowers and single adjustable uppers..
all of the lowers function the same, although as Dave stated with the SS bars changing the intersect points, you have to be carefull. Plant the tires too hard and you'll end up unloading the suspension and you'll just go up in smoke...

probably going to be looking to get rid of the 90/10s and 50/50s as I will be going to adjustables all the way around..