Frustrated

318s don't have a lot of torque, and torque is what you need to bust the tires loose. With a stock stroke 318, an automatic trans, a sure grip, ss springs, and a pinion snubber, that 318 is gonna struggle to do what you want it too. You may simply be hooking up more than you expected to.
When you punch it, does it throw you back in the seat?
Do you have a set of skinnier tires you can throw on just to see what happens?