I have a 20' Sansgter Cuddy that I would love to pod. Too bad it is in such good shape it is not a smart idea. If I did i would look at a 140 Suzuki. Or, 2 smaller motors (90s maybe).
I wrote down the formula for a pod conversion, concerning engine placement et al. If ya need it lmk.
I'd like to see your project. I know epoxy and glass. I know a guy that has done your job, might be looking for work. pk.