Thread: 71 Ford truck 460 timing

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Originally Posted by hellcruzer

The carb is a holley 3310 750 cfm

...which, of course on a stock engine is too big. My '79 ran with the early 780 cfm version of the 3310 on a 10,000 mile cross country trip and it went from poor gas mileage to beyond horrible. I had several different Holleys on after that, but what ran the best - a 600cfm Edelbrock. I would probably opt for the 650 they sell now instead.

Originally Posted by IC2

...which, of course on a stock engine is too big. My '79 ran with the early 780 cfm version of the 3310 on a 10,000 mile cross country trip and it went from poor gas mileage to beyond horrible. I had several different Holleys on after that, but what ran the best - a 600cfm Edelbrock. I would probably opt for the 650 they sell now instead.

It could be a 780 cfm version. The seller of the pickup told me it could be a 780. How to pump up an old Holley by installing a ProForm carburetor main body, the Proform 67101C? Have you heard anything about this?

I may be way wrong, but doesn't your cam also dictate your timing? My cam card came with specs.