I owned that exact 1970 W-30 post coupe (not same color) many years ago. 1 of 252 with 4 speed and the only one with the super-rare W-27 aluminum rear 12-bolt diff only available in that year. I found it with an original 54k miles in garage in Portland, Or. I did a complete frame-off restoration- luckily, no rust and it had all the numbers matching parts other than exhaust manifolds (they were replaced with headers). In recent years it has gone through several different collectors and auctions.