WIRING DIAGRAM FOR 305 INJECTED BUICK (MID 80s ) NEEDED (for my 1950 jetback)

[49FLAMER]

I have bought a 1950 that has a 305 injected v8 /th700 and the required wiring harness, which is a complete mess and a mile longer than it needs to be. Before I start hacking at it a wiring diagram is required, can anyone help with this, I have found a ECU one on the net but I need the body wiring diagram also.
Here in Australia its hard to get some info.

thanks