I think so. This is what I'm checking at the moment. My new loom is a V8 one. There are two possible ones:
LR 402 1 PP 85/86 2.5L & V8 Petrol upto - 270226 Main Harness PRC 5319
LR 405 1 PP 86/89 2.5L & V8 Petrol 270227 - 404682 Main Harness PRC 6311
I'm not totally sure of all the differences, but I chose the later type. This has provisions for a brake fluid warning light which I don't have - I will track other differences as I go.

