Carburator size

Thanks for your inputs. I think the idea of a really good deal and thinking that a lot of times we tend to over carb engines, I was hoping 670 would be more than enough. When I go to the Holly Website it shows to be right in the middle of what they recommend for a decent built out engine up to 6000 RPM. I also forgot to mention that this will be a 90% street car with maybe a occasional visit to the strip. Will most likely pull the 3000 RPM stall converter out and maybe re-gear to 3.55. I guess I'll look for something more in the 750 range.