Hello, I am seeking some help please. First some background: I am restoring a 1971 Triumph TR6. The differential is shot and I was able to get hold of a 280zx manufactured in October of 1980 for free. I have taken all the rear suspension apart and so far I am going to use the differential out of the 280ZX and make the necessary adaptors to make it work in the TR6. I have access to a machine shop, so the manufacture of parts will be no problem. The TR6 has a independent rear suspension and so far, I see no problems as to making this all work. HOWEVER, I have been doing research and so far I am very confused as to what differential I am looking at. From what I gather the 280ZX's came with R180's or R200's. The car I was able to get hold of is a straight drive car. How do I tell if what I have is really a 180 or a 200? It appears NOT to be a limited slip differential, but I am not sure. Would somebody please point me in the right direction? If I have posted in the wrong forum, please forgive me and suggest a better venue to post my question. Thanks, and I am very grateful to have this opportunity to ask my question... Regards, joe