Yes. Definitely a "B" body. Basically the same body style as a '75 RoadRunner. Saw one back in the day. Loved that style RoadRunner. When I bought my Demon in 2000, I had a chance to buy the RoadRunner I had seen as a kid. I only had space for one car. i chose my Demon. Wish I coulda had both.
You can swap the engine and trans. The rear would be too wide. I don't think it would be an 8-3/4 anyways. The K-frame would not work either.
