The Duramax/Allison on a small Chassis is my next project. .
I have a customer running teh BullyDog Power Pup (150 tune) and a HOT Edge Juice ~125HP, and with Stock everything. .
Runinng slicks, (Stock clutch, stock injectors, STOCK STOCK)
Ran a 13. 18 @ 109MPH, and can consistently run mid 13's All Night.
The truck is Brutal on the street. breaking the tires loose in 2nd, 3rd, 4th and 5th by just rolling on the throttle.
It's a good motor, originally plagued by leaky injector o-rings, but they've strightened up a bit, although, the Allison is the most problematic auto transmission of the Big 3.
Merrick