Unless the Ford engine is far and above superior to the GM I see it as a lose lose for everybody except maybe Ford. The dealer will have to double up on parts inventory or wait for special orders to arrive. The mechanics will have to learn a totally new system with all its problems to discover. The buyer will have to put up with everything associated with being new and different and most likely pay more for it because of lower volume being produced. In 89 when I bought my Supra the GM 350 was an option even though I would rather push a Chevy than drive a ford I went with the Ford 351 . The main reason was {There is safety in numbers} better to have a common engine with expertise and parts available than to take a chance on the low production combo that most shops will only see once in a blue moon. I don't see problems with the GM engines the problems they do have are problems caused by Indmar Cats and fuel pump to name a couple.