Hello all, I have a chance to buy an 1985 XJ Vanden Plas for peanuts. It has a 6 cylinder similar to the 3.8 in my Mark X. Will the transmission interchange into my Mark X? I plan on removing the ac, brake booster, seat belts, power steering pump and install on my Mark X. I wonder if the intake manifold is the same in case I need a spare engine for my Mark X, thanks in advance.