Ha - Is this the electrical I have to look forward to?

[71CHEVYSHORTBED402]

Alright man, what's going on here anyway? Bad enough I'm colored blind, though I trained my eyes to adjust for wires if I apply some effort. Yeah tans, orange, green and BS, half the time black looks brown

Anyway, so I got some elect harnesses, which is good news, pulled the easy one and compared it to the old. Now I could probably guess but that gets me into trouble, but my original harness wasn't anything like this. For what it's worth, that green wire nearest the plug is probably for my temp. sender, pretty sure the one is for HEI. If that's the sender wire it's due I'm stuck with a temp. sender on the RH head Nice adapter if that's it.

I sent this picture to the distributor, they're one of the two players. I asked for a source for common harnesses connectors and that, see what happens. Looked up the part #, came up empty.

I'm green, but I did tag all the original wiring, so okay on that end. Picked up a multimeter I don't know how to use yet, but I know a test light at least Any suggestions how to proceed testing circuits, such as perhaps an adequate battery for the task or?

If I were to assume this harness included the A/C compressor (COUGH!) any recommendations for a kit with proper connectors?

Other than that, seems to me the new harnesses aren't like the old really, perhaps an improvement. This is their "HEI Harness", passes through the firewall gutter. If that's their blower motor connect (COUGH!) for instance, the old one came through the firewall, not through the firewall gutter, same for the A/C compressor.

Suggestions always appreciated.