You want a 10 wide wheel with a 235, or 8 inch slick. You will have a bigger contact patch area. If you have traction issues look at your suspension. Just giving you something to look at.
I definitely have suspension issues. I have stock leafs in back. Anyone have an opinion on caltracs Vs. ladder bar setup? Keep in mind I have a lower horsepower and heavier car. I think my goal with this car would be low to mid 10's ultimately.