A buddy of mine is putting together some roots setups for his 42 Fountain. Pump gas builds. He is looking at either a pair of std helix littlefield 10-71's, or a pair of 8-71 hi helix. He was told hi helix 8-71's are the way to go. He wants to run 10-12lbs of boost. Blower shop intercoolers. 8:1 522CI engines. I think he might be pushing the envelope a bit on pump gas with the idea of 12lbs?