I have a 73 duster that i replaced the engine in. The only problem is that i forgot where some of the wires go. Can anyone tell me where these wire harnessess plug in? I think the smaller one goes into the distributor but i cannot remember where the large block goes and what they are for. Please help!

Offhand, it looks like the main connector for the underhood harness to engine harness. The 2-pin looks like the distributor pickup connection and the other looks like it has the 3 alt wires (one big black, and 2 smaller, one dark green, one dark blue), oil sender (gray), temp sender (violet), and + (brown) & - (black/yellow) coil wires. The choke heater, if any, probably runs off the dark blue alt wire.

thanks for the detailed descriptions, it will help tremendously!