another question

That's interesting..I did the same thing on the holley site. I find it interesting that they say 750 and 770 for a street car. A note Whitey, carb size has nothing to do with jet size. The entire engien and package does. SO every carb you buy will require some work to be perfect. Now, some guys dont need perfect, or dont know how good perfect can be. So in many cases, they say "it's perfect right out of the box". I tend to think nothing is perfect out of the box..lol. So in either size's case, I would bolt it on, and see what the engine tells you it wants. It may tell you you're too rich with either one, so you will need to lean it. Or, it may be what you consider "perfect". You dont know until it's on there and running.