whats the gearing in the pumpkins ?
if the truck came with 28 inch tires originally, the jump to 33's might make it feel like a dog with the smaller motor.
I have 4.30s in my Toyota and 33's and 4.56 to 4.88 would be alot more friendly with them both on and off road. These little motors that bit of gearing makes a difference.
I agree in that the old Cuda wheels look a lot more at home on the truck.