Ahhhhhhhh... no. The early harnesses are pretty much one big piece. There's the engine harness connector(sticking out of the the tranmisson hump in Bean's photo), and the tail light harness ribbon (again in Bean's photo), and the main harness (in all these photo's). Much different than the later harnesses.
Start at the head lights. You want to remove the harness so you end up with all the harness pulled toward the interior of the car. Make notes on how the wires are attached to the main harness connectors on such things as light, a/c, etc. Get the car up in the air in the front. The harness runs above the A/C stuff under the front apron. Then along the passenger's fender, back into the engine compartment and into the interior. It's stiff and heavy so go slow.
You can use a harness out of a convertable or hardtop if you are updating to a newer harness. Both the same. But, you want a harness that comes out of an A/C car since you have A/C. I've changed harnesses a couple of times. It's not that big a deal if you stay organized and take good notes and nowadays I guess pictures also.
TR8