14.5 to 16's, its your first time out with the truck, its an auto so the launch is gonna make you or break, and since you have E.T. streets, john force the !@$$ out of the tires and WAIT in between passes, dont hot lap, remove all the stuff you can it wont hurt, tailgate, left headlight etc. I think it would be best if you just go and run, and then come back and tell us how you did no matter what you run.