60 will be more than needed...
There is practice before the heats but Tbowl has practice days as well.
Just to give you some insight.
The SFTL is 100% non profit, everything we take in from memberships, tracks, and sponsors goes right back to the racers at the end of the year event. We are a family orianted group. there are lots of brother combos and even more father-son combos. When looking at the web site take a second to look at the banquet page at the items we gave away. Everyone got something. There were several sets of tires, helmets, custom painted helmets, 1k in gift cert from Works shocks, ETC ETC......