I dispute the part about Eddies being easy to tune . Maybe if your engine is really close to stock and pulls 18+ inches of vacuum at idle . But they are a PITA if you have any kind of cam . I would rather pull the bowls off a Holley than jack around with all the little screws and micro-clips on the Eddie. Then there is the parts availability... try to buy any part other than a metering rod or jet for an Eddie.
That being said I run an AVS-2 800 on my Barracuda because I like the annular boosters . Took me forever to get sorted out though .
And I run a Pro Systems Holley on the 408 in the Swinger .