My tires are 27 1/2 inches tall. I changed my gears because I had 2.73 gears and a stock 4 speed.I gave the trans to a local kid. When I changed the gears I put a new posi,new half shafts,new springs so the car would not squat,all new bushings,cut the driveshaft and put in a TKO 600,and a scattershield etc. I only use a 3.50 gear for road racing, for me 4.11s would make first gear useless.
While you stuff the parts in your car better add the roll bar.That car will easily go better than 11.50s