http://www.speedworldmotorplex.com/calc.htm

I went to the above site and plugged in a 3700lb weight and got an average of 875hp at the wheels. I think thats a little high but Im not sure about the weight either..my truck has been lightened by removing un-needed crap (spare tire/jack/etc) and is only down to ~3400+lbs (dont forget to add the 285lb fat a$$ driver either ).