Keep your existing rims and get lowered springs.
Mine has lowered springs, on original suspension parts.... drives like its on rails.
Re the engine, sounds like youre in the right crowd to do reworks....
Its a fab engine with truck loads of torque..... the SRT is the 300hp lump and im unsure why i isnt reworked for more power..... for some reason the guys rave over a mod for 30 hp more increase.....when any other engine you could grab 70hp more......
Im insure why we cannot tune more from this 3.2 litre engine.....
Maybe simply run it on Nitro Methane and put a NOs kit on it.... maybe this is the answer ha ha.
GB