Here is an Ebay auction for a used Hipo 289 carburetor spacer used with PCV by Ebay member "hertz1966" with a Buy-It-Now of $45.00:
Original carburetor spacer unit found on 1965-68 289 289 Hi-Po 1968 302 and 1969 351W engines.
The spacer installs between the carburetor and the intake manifold providing 1 inch of additional space.
This spacer measures 1 thick with a 1 9/16 bore on the holes. OE part number # C3OZ-9A589C.
Original FoMoCO part suitable for Mustang, Falcon, Fairlane, Galaxie, Mercury, Comet etc. equipped with small block Ford motors
Part is clean and in excellent condition.
1964-69 Ford Mercury; Carburetor to Intake Manifold Spacer; 289 302 351W; 4BBL | eBay
-Fred-