Stop in for a cup of coffee

ScampMike said
but now I see why the PO had a 100 NOS shot on it - had to make up for what he was losing through the drive train..

yeah probably a good assumption. here's some numbers for you though.
my 99 Cummins 4wd was making 467 hp at the rear wheels, when we pulled the engine and put in on an engine dyno the shop had finally bought, we hit 571 hp