www.dhraonline.com
Those are the best Diesel rules around, but I have a biased opinion, and they will be changed, soon, for 05.
Then you have about 4 different classes in 2 different ATPA orgs.
Link to one of them.
www.enterpriseengine.com
And, the NTPA is fooling with one also.
A group in Indiana, has a points series going for single chargers,
www.haisleymachine.com for details.
There is a mess of them in Kentucky, mostly different.
The Californians have way crazy rules "Extreme" they call them.
NW Pa clubs are following DHRA lead, but southern and eastern PA have different rules, BOTH different.
I have just touched the tip of the iceburg here.
Pretty much, stay with a stock charger, but then the Chevys will pound you, you could go to twins, but alot of the places will put you in with Scheids.
Stick with Diesel fuel only.
In my honest unbiased opinion, figure out where you want to pull, and who is running those pulls, build your truck to fit.
If you want to travel to big pulls,pick a class from the DHRA, build your truck to fit, and then look at the other places and see if you fit in.