I'm a fair way into the restoration of a '76 GT80, when I brought it it had been stripped down to a dirt bike and had had all of the electrics removed. I'm trying to put it back on the road and the only thing I'm struggling with now is a wiring harness (loom).

I've seen various looms for sale in the U.S but they're all from '79 - '81 models, as they're liable to be quite expensive by the time they've landed in the UK I don't really want to chance buying the wrong one so was wondering if anyone can tell me if they're the same across all models.

I have a service manual that covers the years '73 - '82 and it only has one wiring digram/schematic so I'm assuming they might all be the same but I'd like a second opinion.

it's probably the same yes. these bikes hardly changed at all during the years they were made.