all years had the same engine, and all were turbo, but if you really want

it's an 88 with a turbo.
Part number for year "3/88-90" headgasket (~85 dollars) is: MD997457 (I also got this: MD115646, but if you could check if there are any differences, I think the first one is best either way.)
for the steel exhaust manifold gasket, part number is: MD102683 ~$8.35
thank you!