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June 5 2012 at 8:35 AM

Falcon67  (Login Falcon67)
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Response to Tunnel Ram

Note that the Holley 390s are vacuum secondary and more forgiving. The Holley 450 list 9776 is a mechanical secondary carb with no back shooters. The 390s would be easier IMHO to tune on the street. If I was going for hot street/strip I'd use a pair of real 650DPs and skip right over the 450s. The other thing I'd watch for is idle circuit tuning - you'll have two idle circuits, both engineered to be the only idle circuit on the motor. I'd recommend a wide band tuning tool to help dial it in if you're serious.

1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
Owner built, owner abused.

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