Wiring Diagram (NO LBC)

I am wondering if I could get some BAC help, (big american car). A friend has 
an old truck body set on a 79 Trans Am frame and drivetrain. He needs a wiring 
schematic for the fuel gauge. Rick Fisk was most helpful last time I asked the 
list for some guidance to this sort of information. Rick, or anyone else, do 
you know where this fuel gauge info could be found?? 
Brad

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