Hi Greg,
I am a relatively new member here as well, i have a '52 B3b and i live near Springfield, MA. I had similar thoughts on swapping in a Cummins, but im really starting to enjoy the old 218. It runs well and the three on the tree still drives well. So more than likely i'll pull the motor and give it a nice tune up and a fresh coat of paint and let her be. I really do love the diesels though, my other trucks an '03 Cummins with some mods done to that. Anyway welcome, this forum is the best so much helpful information and people.
-Chris