Hello, checked out the 91 351-W. I am reading the casting on the intake. It came equipped with a Holley TBI system and the serpentine pulley system. The casting of the block looks the same as the 302 in my personal Scout and should swap into the new Bronco with little problem. I am a little concerned with the flywheel, torque convertor and tramsmission. I have found out that I was mistaken and both Broncos are equipped with C4 transmissions. I was bit by a similar problem with my Scout. I am guessing that I should be able to simply pull out the 302 and install the 351 with exhaust and belts being the biggest hurdles. Just how much longer is the serpentine drive than the V pulley drive? It killed the 5.0 that my Scout was suspossed to get and I had to build a 302 instaed.(Yeah I know that it is the same displacement, different story) Thank you for all the infromation it hs really helped me with my knowledge of Ford interchangablity.