Here is an Ebay auction for a used Hipo 289 carburetor spacer used with PCV by Ebay member "acond" with a Buy-It-Now of $64.00:
This is a super nice all original Ford carburetor to intake spacer (correct 1") which is correct for all Ford and Mercury cars for the years of 1964 1965 1966 1967 1968 1969 with the 289 or 302 or 351W engines with the 4V carburetor. This one is flawless and correct in every detail and provides the correct location for the PCV valve hose.
65 66 57 68 69 MUSTANG 289 302 351W 4V SPACER PLATE ORIGINAL FORD SUPER CORRECT | eBay
-Fred-
This used Hipo 289 carburetor spacer used with PCV sold July 24, 2023 on Ebay for $49.00.
-Fred-