I would put 2 MT Drag radials on before changing anything else. Lots of ET in the 60'. What was your 60'? You had to be spinning off the line with street tires.
I run wrinkle wall 28x10.50 sportsman pros aired down to 18psi. No spin, I have still and video of the launch. 1.67 short. My converter is killing me though. Engine makes peak torque at 4500 and i'm launching at off idle flashing to 3500
