Robert ....... what you have now works, and works well. It also looks damn good sitting in there. The power difference probably couldn't be noticed in daily driving anyway.
The 351 has more potential as the 354 Stroker has already had a major modification done in going from 302 to 354. The 351 is very close to the stroker in pretty much stock form and you can go up from there.
My opinion is ........ if it isn't broken it doesn't need fixing.
Enjoy that fine car, and was last weekend some good cruising' weather or what ?