Brew - those tires look very realistic, and the old Skool modified with them on all four corners is awesome.
If you'll part with a set I'll build a car to try them on - maybe a serious replica of one of the most famous northeast dirt mods - Bizzie Reutimann:

I'll PM you. I have something you might like in return for your generosity.
Todd - I like your attempt too. Now if only there was a way to build a 'dirt' style dirt slot car track. Not real dirt, but a surface that you groomed before a race and it had a sort of texture for these tires to bite into. That's why awhile back I was curious if anyone had been to a track that uses synthetic dirt which was created to limit the dust for horse and car racing.
Slothead