I'd drive it if the fuel trims aren't maxing out. They probably will with a 4.8 tune trying to run a 6.0.

 

There is tuners locally also, Jesse and Manny

 

I'd go with BBP I've had both BBP hands down!!!

 

i went with BBP and i love my tune. but at times i wish i would have gone with nelson because they are local and will make in person re-tunes super easy. call up nelson i'm sure they will work with you on the tune. mail them your ecm before the swap, have them mail you one back with basic tune. roll on down and have a full tune done and rock and roll.

 

I got Nelson Performance within 15 min of my house so easy choice there.

 

I have had issues with Nelson......my LTFT were maxed out couldnt get truck to restart after if got to operating temp(stopping for gas or grocery)..they told me to drill the t-body no luck so I bought Hptuner
and used (hitechtuning.com Ed hes a sponsor on ls1tech) great service fast response and does email tuning