I see no reason why not since they're essentially the same car mechanically. I'm guessing your 1986 is stock? Either way the parts should swap right over.I have an opportunity to buy an 86 Fifth Ave. for $500. It has ducumented 76,000mi. on it and the engine runs great. I'm wondering if I take all the ignition and other parts off my 88 Fury could I put them on the 86 engine? I know some things are dif. between the years. Also all of the trim parts are in great shape and was going to strip it and junk the body (It's in aweful shape).