Need a modified chassis that was the Snowbirds TC Oval winner in 2003? LMK
I'd offer more set-up help but my experience is all on carpet with TC Oval. All I can say is put some gear on it! It's much more than you'd think and go to 64p gears using a 88 tooth from Kimbrough for a spur. Gearing these cars is crucial and it'll keep you ahead of the pack. Many racers assume their on-road gearing is close but it's not anywhere near close!
Do not over engineer the chassis with all types wierd spring set-ups. Start with your basic on-road set-up for springs and go from there. Don't automatically assume the car will work using stiffer right side springs.
Good luck and enjoy!!