Caesy, when you say slick, by them self could shave .5 imo
What size the slicks?
The 12.59 @ 8 psi might sound good, but the truck feels at mid pull at the end.
My target is with this street set up low 12, 12.2 will be nice, but I just upgraded my brakes, and they say nothing under 20" rims, so now I have less options.
Some said 27" diameter was the best