Summit mech. fuel pumps?

I'm in the market for a higher volume pump for my 360, right now it has a parts house pump thats putting out 7 lbs., but i'm not sure of the volume, I would just get a holley or Carter M6902 that freeflow about 110, But there 100.00 or more, just can't swing that, so i'm looking at the Summit pumps for 65.00, they either free flow 80 or 110 (choice of 2), I also am looking at these other 2 Carters, but i don't know what they flow, The M60980 (56.99) & M60519. (33.99), anyone know about any of these pumps?