The basic Carter performance pumps (at least the ones that were made back in the day) were perfectly capable of supplying more fuel than needed for the vast majority of street cars. They had the advantage of being clockable on line position. Back in the time when I had access to the information, all of the large bodied six valve pumps were being made by one company (Blackstone???) and were relabeled by a wide array of marketers. No idea whether the guys selling them now are modifying pumps or whether one of them bought the tooling or ?
Holley pumps used to be made by Pierce Governor - I think Carter got that contract for a little while - then who knows. Carter used to make their own stuff, then that division got sold. Probably made in azzspakistan now...
As mentioned earlier, the inlet size line is most critical since its under vacuum and working through a tank end restriction at that if you are using some sort of strainer at the pickup end. A return line system is a huge positive even if its restricted with an orifice, just to keep cool fuel flowing and reduce vapor lock tendencies.
