Topic: Correct intake for open emissions '65 4v

['65 Full Throttle]

Is C50E-9425-A the correct intake for a '65, 289 4 A-code, with open emissions?

On mustangtek they list the same part number in different rows for open and closed emissions. Are they simply the same intake or are there actual differences that need to be inspected beyond the part number?

Thanks for info!

[CharlesTurner]

Depends on the build date of the car.  A late '65 4V can have a C6 casting.  Earliest I found was a 5E1 dated one (May 1, 1965)

['65 Full Throttle]

Interesting.

My car has a late June '65 build date.

Are there physical differences on the intake for open and closed emissions beyond vacuum plugs? I've noticed some castings have a plate on the back with 3 screws and some appear sealed.

[CharlesTurner]

Your June '65 car most likely had the C6 4V intake.

I haven't compared it side by side with any of the C5 versions, I'm sure there are differences.

[steve_f]

My May 15 San Jose 65 A code has a C6 manifold with a 5D28 date. If yours is a SJ car then as Charles said it would have had a C6 manifold.

Steve

[CharlesTurner]

My May 15 San Jose 65 A code has a C6 manifold with a 5D28 date. If yours is a SJ car then as Charles said it would have had a C6 manifold.

Steve

Being a San Jose car doesn't matter.  Guessing most 4V cars, starting sometime around May '65 would have originally had the C6 intakes.

[Brian Conway]

My car has the C60E-9425-B/5E6.  Scheduled build June 1 and received May 29.  San Jose car.  Brian

[jwc66k]

Closed emissions means that in addition to the PCV setup on the RH valve cover that has a hose connected to the base of the carburetor, there is a hose from the LH valve cover oil filler cap to a fitting on the front of the air cleaner (the HP hose goes under the base and attaches to a fitting there). Open emissions means that there is no second hose to the air cleaner. A closed emission setup is required for California smog 66 and on. This applies to 2V and 4V engines. Road draft tube engines are a whole different setup.
I have a C5OE-9425-G manifold (D/C 5C9) on my 65 GT Fastback (eng assy D/C 5G10T), and a C6OE-9524-B (D/C 5G27) on my 66 GT K Fastback (eng assy D/C 5H23Z). The differences in manifolds are the 65 has a small temp sensor hole and the pad to the rear of the carburetor is not drilled and tapped. I have the bell crank type kick-down for the C4 AT. The 66 intake has a large hole for the temp sensor, three holes drilled and tapped on the pad to the rear of the carburetor for the smog bypass valve and the same holes (although unused) for the AT kickdown. The date for the temp sensor (C5DZ-10884-A & C6DZ-10884-B) change-over is 9/1/65 (Sec 106 pg 17 Ford Car Parts). I would think that the manifold application date would be the same.
Remember, the casting number is just that - a casting number. The manifold was then machined for multiple applications and received a different (unmarked on the item) part number. The service part number for all 1964-68 289/302 4V applications (ex GT-350) is C4OZ-9425-H so it must have the large hole temp sensor and all possible accessory holes drilled and tapped. It's casting number should be C6OE-9425-B (or C8AE-9425-B, the latest p/n).
Jim