[Katshot]

I wish I could be more help but without my tech manuals etc, I'm guessing. Is it a standard HEI setup or DIS? I can't remember what model used what in what year.

 

[Katshot]

OK, I finally checked the schematic. You have a standard HEI system. Piece of cake. If you aren't getting any power to any wires at the distributor, that's probably the problem. The Dark Blue wire (at least according to the schematic) is the Battery feed for the coil. It is fed from the engine compartment fuse block, fuse A13 (20A). It's hot with key "ON".
Hopefully this helps.