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Had an Offy Dual Port manifold and 4165 (spread bore) Holley on the 289 in my street racer...with 4.62's the engine would pull good to over 6K and ran 14.0's @ 100 mph...good pretty good gas mileage too IIRC; that was back in the 1970's...likely few of those manifolds around anymore...

The combo worked pretty well with 3.50's too, which was my everyday gear. With an 11" converter, it ran mid-high 14's and still had good low end power...

Have fun!
 

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Thanks for the trip down memory lane...most of my friends thought I was nuts to buy that weird manifold and carb...

Guess I proved them wrong...*G*

Hope you do the same...
 
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