Holley TBI

[big dump]

Went camping this weekend and determined in the hills that I really need to go with a TBI or some sort of EFI because of the hiccups in the elevation. I have an opportunity to pick up a Holley Pro-Jection 2bbl system off of a guy on craigslist for a steal. However, on Holley's website, it specifies that the Pro-Jection kit P/N 502-20S is only good up to 275HP. I'm running a crate motor in the 72 that is the newer style with the center valve cover bolts that is supposed to be putting out 300HP. Realistically, I'm sure that this engine isn't putting out 300, however I'm concerned that it is not enough for my motor. Any of you guys have any experience with this? Should I step up for a larger unit that is rated for higher horses? BTW, here are a couple of pics of our camping trip this weekend, it was perfect weather and great opportunity to get out of the heat for the weekend, enjoy.