I'm replacing the 4.2 out of my '85 Eagle with a 4.0. It's got ~90k on it, and the head was refreshed on it shortly before I bought the car with 85k on it. It has the TFI upgrade, but I think I'm missing a spark plug wire or two at this point. The smog equipment is the high altitude stuff, so you probably don't want that. The long block is available if you're down to pick it up in San Diego, just make a reasonable offer.