Not that I can think of off hand.
640lbs of additional material to convert to a runabout, a 16hp outboard, fuel, gear and people will be a limiting factor, IMO.
A 16hp outboard will push a fishing boat about what people might expect from a smaller fishing boat. But it'll be a very slow cruising runabout compared to typical factory made runabouts, esp running the same boat w more material weight added.
Guessing its a14ft semiV jon boat?
Lots of rigging to add runabout steering and motor controls.
Can it be done? Yep, just need time, money and want to.
Even if you havent bought the Duracraft yet, how about some pix of the boat to see what you're talking about.
FYI: I too hate to see great vintage boats turned into fishing boats. It can only be original once. I've got a 13ftr fishing boat I havent picked up yet but it was slated for a conversion. Guy thought it would make it more saleable. And I have a line on the same model of boat, but w a factory added helm section so it'll be sort of a eunabout but still a decent small fishing boat
Welcome to iboats. Tin or fiberglass Duracraft?