i guess im the "lucky" few....i have a cammed 6.2 in front of my 53k mile 60e and im run 4:10s.
Truckshop, Skeet is running a performabuilt Level 2 (w.o converter is 1800ish, with comverter is 2600ish) i you was going to buy that FLT for 2800 plus shipping id look into a pb lvl 2 with a converter.
i was going to go 80e until you realize the 80e has a CRAP OD and me being on 4:10s id be at 2500+rpm at 70. right now im running 2200ish at 75 and still get 19mpg on the highway and 15ish in town.

i guess you can say im the guy thats not willing to swap in a 80e bc this is my DD/Family ride so i do need some kind of gas mileage.

decide what you want to do as far as HP then decide what money you have to spend on a tranny upgrade. i wish i would have waited to buy an 09 just for the 6spd. i would look into swapping the 6spd if you dont abuse your truck a lot and your not wanting to run a 4:10+ gear

 

4l60e has a .67 and a 4l80e has a .75... not that big of a deal
6l80e has a .66

 

id rather have a family truck i can depend on and cost me 1 more MPG.. haha

 

Whats this going in, and 500hp to the wheels or crank?

 

Its going in a 07 nnbs sierra crew and its 500hp (hopefully should be 475-515) to the wheels.

 

In this case go 4l80e for sure. Thats alot of weight and alot of power to the wheels.

 

Do you know anyone that has done the 80e swap on the nnbs trucks?

 

Just did a quick search and not much popped up. Apparently its not that common and difficult to do.

 

Truckshop has 420rwhp, skeet has 480ish both on pb lvl2s.

i cant see myself swapping to an 80e bc i dont race my truck alot, nor do i abuse my truck. i dont go from OD to 2nd or 1st i pull it into gear vs makin it downshift.

 

it shouldnt be much different, your still going from a 60e to an 80e....

going to need a custom crossmember, custom drive shaft, call speartech and they can make you a harness adapter or you can repin your plug, your going to need a 4l80e converter.. (tell them you want it to fit a 60e flex plate) or get a 80e flexplate and tell them you want it for that.... gonna have to find someone to do a 4l80e segment swap in your PCM and some custom cooler lines..

might as well throw a shift kit in tooo