Runup, I run a 15x8 pro convo with a 3.5" BS and a 28x10.5 MT slick. No notch frame...
but im in the process of notching my frame to fit bigger wheels. According to my calculations you should be able to fit a 12" wide tire once you notch the frame 1". I don't plan on lower my car anymore than it needs to be, but I guess you really don't know once the new wheels/tires are on the car. I've seen other Montes run 15x10 rims with a 29x10.5 slick with only a notch frame.
What stall do you plan to run? That 4.30 gear seems a bit too much if you plan to use the hose... unless its 1/8 mile racing?