Sorry for the late reply.
The busch East division is 19 Turn either the peak performance Raven S 19T
or the Venom Fireball 19T motor 6 cell 3600mah Nimh packs.
Late models are 27Turn 24 degree timing or the Venom 21T Double.
6 cell 2400 Ni-cad Peak Performance powermax.
mini sliders are completely stock with stock battery. only upgrade is to a 370 motor. any other questions go to nhrccarracing.com that is my website the rules are in the forum section. I hope this answers your question.
Darin.