Here is an Ebay auction for an NOS C3OZ 9A589 C Hipo 289 carburetor spacer plate by Ebay member "ford_doctor" with a Buy-It-Now of $125.22:
ONE NOS in the factory packaging Four (4) barrel spacer plate.
Includes black rubber vacuum cap and clamp, needed when rear nipple/port is not needed.
1963 1964 1965 1966 1967 1968 1969
Ford 289 302 351W Carb Intake Spacer #C3OZ-9A589-C.
Compatible with many Holley, Carter and early Autolite carbs.
Center to center stud holes 5-5/8” front to rear.
Center to center stud holes 5-1/8” at front and across rear.
Pre-confirm this will work on your manifold.
Some signs of shelf-wear and aging.
Overall very nice unused condition
Does not fit Spread Bore type carbs/manifold.
* Satisfaction Guaranteed.
* 14-Day return Policy
* Items ships the same day or next.
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* Professional packaging with extra attention to fragile items.
* FAST SHIPPING with tracking numbers. Saturdays and Sundays too.
*Same Day shipping when purchase is made before noon. PST
* Experienced online seller - Serving customers since January 2001
* Thank You!
Estate Sale
NOS 63-69 Ford Mercury 289 302 351 4BBL Carburetor Intake Spacer #C3OZ-9A589-C | eBay
-Fred-