The main draw of an '85 is the 2.88 rear end. Other than that the differences from other years don't really increase its desirability. If it's a rust bucket and your '82 isn't, I'd go ahead and use it for parts.

Second thought: You mentioned "flat headlights". I'm not sure what that means, but Euro was brought up as a possibility. If they car is a euro model, that opens up an entirely different can of worms.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.