OK, I posted this in the Seville section, but thought this might be a better spot for it. I know this is kind of an odd question, especially since so few of us seem to care about this model ..but I'm thinking about getting a bustleback Seville, I know the 80 is the best for engine, but I prefer the looks and equipment of the 82- 85, plus, of the few I see that are still around, I see most of those years.. here's my question.. is it an easy swap to put a 4.5 or 4.9 engine into this car? , particularly an Allante 4.5? ( 89 to 92) or just a seville or eldo engine from the late 80'S ? my thinking is the added horsepower and the fact that most of the bugs were worked out by this time would make this engine a good upgrade..What do you think?