Tunnel Ram on a 383

I'm starting to plan out my next Mopar project and I wanted to see if I could get some insight and opinions. I'm looking for a Demon to build, and since I already have a small block (340) Duster, I was thinking about putting a 383 in a Demon. I have always wanted to building a car with a tunnel ram, so I'm thinking maybe now is the time to do it. I don't know much about tunnel rams, like is one brand better than the next? What kind of build to I need to do in order to support a tunnel ram? I have heard they can be difficult to tune for the street, but I have no idea how true that it. How do I determine what size carbs I need? I'm not looking to building something totally radical, but not leave it stock either. I have a stock '68 383, 727 with 70K miles on it. It was originally a 2 bbl, but is now a stock 4bbl.

What is a good combo to go with for a tunnel ram? Any information or suggestions would be appreciated. Thank you!