I have been following this thread to see if someone has been able to find something new for the 15" tires. Seems they haven't. Now if you want to stay with 15s then take a look at Nittos, I think NT555R line. I have the Drag radials on my rear which are 335x50x15(quik look showed 325s at the dealers) and fit nicely on a 10" rim. On the front I have 235s which have a "conventional" tread pattern. There are reports of these tires in road track usageand supposedly they track very well. They get fantastic grip. I too have the wide body and they sit at the inside of the lip of the wheel well.Check around with several of the tire supplyers. They should go for around $200(drag radials) each My settings on my car are 4" on front and 5" on the rear. Mine are getting pretty old, so its about time I got some new ones.
Bill
Bill