First, get rid of your "trusted mechanics".. swaps are no big deal and a good mechanic can and will build a streetable engine, stroked or not.
Then you might want to figure out what you have first first and fine tune it from there and see if you get it where you want it. Wrong cam can hurt more than help, got to have the right gear ratio, right carb?? etc.
I bought mine with a 340 that was done all wrong. Slowly figured out what I had and made changes and it ended up being a really nice running engine. Fast, strong and reliable.
That said, I just put a 410 stroker in over the winter and can't even compare the two. Night and day difference in power. Down right scary if you aren't careful and yet very streetable around town. More speed for sure but hard to tell how much since traction is a major issue now.