Steve76 , I think what you are referring to is lbs per nautical mile.
In the very back right before noise abatement procedures of the 76 AFM there are a bunch of graphs for various altitudes, temperatures, and TASs. I think it is located under additional information or something similar, but for some reason it is not in the performance section. That should provide answers to the fuel flow secrets of the 76 universe.
Do any interesting tours lately ?