How bad is this tire/gear combo killing me??

4 speeds rule. sounds to me like your engine is not making the hp it should for whatever reason. my 35 plymouth 340 x head 40 over comp cam 4 speed 323 posi with 255 /60r15 's will shredd the tires and lift the wheels at any given time. i have a bears ladder bar with coil over setup in the rear. mustang 2 in the front and the car launches like jack the bear. try dumping the clutch at a higher rpm and if it bogs down than chances are its all in the engine. just my thoughts.