After several years of SCCA racing (on slicks) someone gave me a set of treaded tires so I could try vintage. If you would like to try vintage or some other type of racing with your FF, I have three sets of used tires, no charge, just pick them up in Indianapolis. These all have plenty of heat cycles but are still quite usable.
Dunlop FF
Fronts 135/545-13 Rears 165/580-13
Avon FF
Fronts 5/22-13 Rears 6.5/23-13
Toyo Proxes R888
Fronts 185/60 R13 Rears 205/60 R13