I know these are hard to find for Y-Blocks, maybe not so much for FE's, but a guy on another forum I frequent has a complete PCV system off a '66 390 motor for sale here:

Vintage Thunderbird Club International ? View topic - PCV tube

 

The 1966 F100/F250 FE PCV system consists of a PCV valve (generally not worth buying used) and a preformed rubber hose that connected from it to the carb spacer.


A picture of the correct 2bbl carb spacer is here. They are a fiber spacer, not aluminum or other metal so they can get holes in them and become unserviceable.


3 carburetors. 2 holley's. 1 motorcraft. 1 2bbl carb spacer


Other than that a couple of spring clamps on the hose to keep it from slipping off. That's about it.


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I see the pictures over on the TBird site now. Definitely not like what was used on FE trucks in 1966 from what I've seen.


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That is the car version as I call it. I have that on the 410 in my 67 Mercury but the truck has the basic pvc valve and hose as also seen on my Ford small block 289-302