G'day, I've been running a 427 with a 2x4 setup for many years now and I have a early small port 'Tarantula' intake [the old torker with the twisted carb]This ran strong with an 850dp but I'm thinking of trying an Airgap as from a more modern technological point of view I figure that they'd out perform the older intake?Unfortunately I cant find the flow tech on the early intake.Anyone tried these at all with any comparison?....thanks...Dave