I don't have any personal experience with that intake, but I have to say that it doesn't appear nearly as exciting as with the dual-quad top.
I am biased, since I've been running an old cross-ram on my 65 for a long time. I'm pretty certain there are faster single four intakes out there today, but I am sure I've made more power with this, than over the stock intake.
What kind of rear gear are you runnin?