I've been driving 500 inch strokers on the street for the past 20 years and have used a bunch of different carbs. EFI works the best and I have no intention of every using a carb again now that I've switched, but if you aren't ready to switch to EFI then pick a carb based on your cam.

A smaller cam will let you run a street type carb such as an Edelbrock 800 or one of the less expensive Holley models. A performance cam will probably require a more expensive Holley carb with the extra tuning capability. A 750 high flow type of carb works great on the street. Holley used to sell them as 950 HP carbs.

If you have a performance cam and want a good carb with adjustment capability then contact BradH who posted above. He has a lot of experience with those types of carbs and he has a few of them for sale in the race section.