There is bunch of stuff, right off, drop your air pressure down, to 14 psi. Heat your tires up in the box, I know your going to hear many opinions here but try it in the qualifaction rounds and see if it works. Try various rpms in the qualifactions.

Get a set of upper and lower control arms and a air bag, put the air bag on the right hand side and air it up try 10 psi, then more, then less. Change only one thing at a time and write down the results, the track temp, and conditions. running 1.40 60' is no small task. Ask the pro's mine car will run in the 1.5-1.6 range generally.

If you have the cash you cna throw money at the problem and buy a set of 9-10" wide et streets, they are good tires keep the air pressure on 10-14 psi range.

Mac