Just got back from the local 1/8 mile track. My LBZ ran very well, I was killing everything out there. It's a 2500HD ec sb 4x4 LT2 with big tires and a 50 lb 3 ball trailer hitch. My only mods are:
-dirty Airaid intake
-4" catless MBRP exhaust
-blocked off EGR valve
-Stanadyne fuel additive
-"Torque South" tuned with EFILive
fastest times :
60' - 1.878
ET - 8.736
trap - 78.5
That's a personal best, I am very proud of the truck and especially the bone stock Allison. What an excellent product!