For a Moose Pump you really need a turbo, and to take full advantage you need an intercooler as well. If you dump all the fuel from a Moose into the N/A 6.9 or 7.3 all you'll do is make lots of black smoke and heat. If you turbocharge you can use all your stock fuel+have room for more, maybe for what a Moose can provide. Usually once you turbo the limiting factor becomes boost. You can only put 10-12 psi to a stock 6.9 or maybe 15 to a stock 7.3 with head bolts consistently without lifting the heads. You can address this by studding the heads and using updated head gaskets. After than your limiting factor is that most of our turbos become pretty inefficient and superheat the air charge much beyond 13 psi, an intercooler wil let you stuff more air in there even with a lower absolute boost number because as we all know there is more oxygen in cooler air than in hotter air. At some point the limiting factor is the high compression ratio, you can get a bigger, more effcient turbo, you can intercool, but at some point you can only stuff so much air into a 21.5:1 compression motor before things get stressed and start to break.