We have been involved in professional offroad racing for a long time, you may want to look into the different series and see what class suits you best - SCORE (Baja 500 & 1000 host) is a pretty expensive series.
thanks, i was thinking of doing 7100 stock mini but could not find the regulations. and ya i don't want to start with the 1000 I live near a area where baja 500 is held, might try that if i can get the $ after finishing the truck. I did work with Lucas Oils trophy Truck and baja devision when i was younger but never did on my own, or how a 1st gen 4runner would do/class