I'm not against 3.91's, but this car won't see any track time so I would like it to be somewhat comfortable to drive. I'm just a little weary of 3.91's and a 3800 stall for the street. If low 12's aren't within reach using this block and rotating assembly, that's what I'm trying to find out. I would like a nice comprimise of acceptable street manners and low 12 ETs.