Topic: Open or Closed Ventilation System for an Early 65 "A" Code?

[blk65fstbk]

I'm restoring an early (November 5, 1964) 1965 Mustang Fastback. It's an "A" code 289, 4-speed manual, no PS, no PB, non-A/C car. It was built in Dearborn, MI and delivered to the Davenport, IA sales district.

The car didn't come with the original engine, but I was fortunate enough to find one out of another 65. I want to restore it back to how it would have been set up originally, but don't know if it would have had an open or closed ventilation system. Or what the correct components (air cleaner, oil cap, road draft tube, pcv valve, etc.) would have been. Can anybody help?

Thanks.

[CharlesTurner]

If the car had a California DSO, then it probably had closed emission setup, which for a '65 A code would simply mean a PCV setup with an oil filler cap that has a hose running to the front of the air cleaner.

For non-CA DSO, it could be either a road-draft of PCV.  Your car was made when road draft tubes were being used, but quite honestly, nobody can refute either road draft or PCV since they were used at the same time.  A PCV setup would be much better for your engine.