Carbie selection

[Innuendo]

Any of the mentioned carbies will work fine. You must tune them correctly of course.
If you have a mechanic who favours one over another it is because he/she understands that make/model.
One brand over the other? Really doesn't matter.

[sandasharpe]

Don't try to run dual fuel with a Rochester, accel pumps suffer and gasket dry out and leak. Holley is a better bet. Sounds like you've decided to ditch the gas and if so the Rochester will run your stroker as well on a tidy street engine. If your going to up the ante on a stroker go a larger holley. Holleys aren't the best for smooth idle and fuel economy but work well on cammed up engines.