Actually my truck weighs 5184 with me in it. I did pull the tail gate off trying to get in the 10's, but it didn't do anything for my e.t, just improved my mph. With your 4200 lb truck you'll need to put a minimum of 625 hp to the ground which is doable with 345 cubes and about 18-20 psi of boost. Tim at Mr. Norm's is the only tuner I would trust with Diablo CMR, Hemifever (Sean) is the only tuner I would trust with SCT. Good luck with your build. Nice to see someone else trying to get a Ram Hemi in the 10's.

 

It won't take near that much boost to run a 10. It took 12 1/2 psi for my 4600lb truck to run a 10 sec pass. 347 ci 12.5 psi and only 12 degrees of timing. Get a t76 and you will be fine.