Topic: 1967 GTA 390 thermactor system

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There is two ports on the vacuum fitting for the thermactor hose in the above picture,  what was a use for the second port ? Reply # 28 pic.

[jwc66k]

The fitting is universal, used on T-Birds, Mercurys and other cars that may have had a vacuum requirement for tilt wheels, head light doors or some other future vacuum operated device. Many that I see have the two smaller ports capped and use the large fitting for power brakes. As a universal fitting it cut down on inventory.
Jim

[J_Speegle]

There is two ports on the vacuum fitting for the thermactor hose in the above picture,  what was a use for the second port ? Reply # 28 pic.

I have singles and doubles of those fittings  just depended (it appears) which one was chosen for each engine build - with the unused capped

Much like the 3 port thermactor pumps being installed originally on 289's with one of the attachment ports capped  often see this way on 66 289's

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About what percent of total production of mustangs with the 390 and thermactor system built for the California market came from Dearborn ? I understand this may need to be a guess, thanks Paul.

[J_Speegle]

About what percent of total production of mustangs with the 390 and thermactor system built for the California market came from Dearborn ? I understand this may need to be a guess, thanks Paul.

In 67 very very few F code (Dearborn car assembly plant) cars IMHO were sent to the two California regions in since San Jose was building all models and body types. Believe that a fair number of cars with 71 or 72 DSO's that were built at Dearborn would be those odd ball cars without Thermactor systems since the DSO shows the origin of the order not always where the car was shipped to when completed. But it was very rare IMHO - Maybe a hand full of cars.

Of course you have cars such as Cougars that were only being built at Dearborn so all of those cars going to California were assembled at Dearborn with the Thermactor systems if being shipped to California. So its not like those workers never saw them - sure they we're happy about the extra work and details


Now some of the Thermactor equipment was already attached to the engine when it was shipped to each assembly plant from the engine plant. Have seen differences in systems (complete system installed in the engine compartment) between thermactor systems installed at San Jose compared to Dearborn on 66 and 67 Mustangs

[travnemi]

I was wondering if the small diameter steel vacuum tube from the anti backfire valve is a correct fit? Here's a few different angles, with and without the air cleaner. Please excuse all the waveyness of the steel tube, I had to straighten it out the best I could. I was shipped to me a mess. Once every this is correct, I'm going to get a replacement made. Also, what would be an exceptable wat to attach the small vacuum tube to the emissions tube for the concourse driven class?

Thanks

[J_Speegle]

Looks like the routing at back is incorrect and your missing a few factory bends - maybe these will help

Front hose is too long (ends too far to the drivers side) but maybe adding in the other bends and changing the routing will shorten it up to where it should be

There is an approx 20 degree bend/dog leg that moves the tube from the outside edge of the large vacuum tube to the inside edge about mid way. Shown by the purple arrow in the pictures

Think I might have one or two of the small dia lines but don't know/remember how bent they are from factory

[travnemi]

Thanks Jeff!!!

PM me with details if you have one laying around and willing to part with one. Also, I have two smog hoses that go from the pump to the "T" and they are both wrong, I wouldn't suppose you have one of those? Is the small metal vacuum tube supposed to be painted engine blue?

[travnemi]

Would anyone have a part number for a Anti Backfire Valve for a Dec 1966, San Jose build 390 mustang?

Thanks

[J_Speegle]

Would anyone have a part number for a Anti Backfire Valve for a Dec 1966, San Jose build 390 mustang?

The assembly manual shows some C7 part number but  it doesn't look like anything I've ever seen or heard of

Looking at a Aug 67 MPC  It shows C6AZ-9B289-C for the 67-67 390.  Don't have a picture currently with a box, number and part but it may be correct

To make sure you get the right piece you should be able to compare the two port valve you have engineering number to a new one. Guess you've figured out its easier to by a NOS one than replate an original

Don't accept one stamped with HOLLEY on the top cover 



I've got some (it appears from this picture) used one I could double check for that engineering number but I believe you have one currently. Part is on the face where the mounting bracket attaches. Just a picture of one of the boxes of parts I happen to have on file

[travnemi]

I can't find anyone to plate the one that I have. I tried the Eastwood paint, looks pretty good but it's not the same. I've been looking for a NOS one, but it's just hard to locate one. I'll be making some phone calls today to various parts houses. Thanks for your help Jeff.

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Would the diverter valve for Travis's car have a date code on it ? Also would it have a part  number such as L3331-1 along with the C6 number.

[preaction]

Would a master parts catalog be the best place to identify a ford number on a part (engineering number) to check for the part being used in the right application ?

[J_Speegle]

Would a master parts catalog be the best place to identify a ford number on a part (engineering number) to check for the part being used in the right application ?

Often the MPC don't include the engineering numbers of all the parts. Sometimes yes sometimes no. If it was listed it might also show a substituted part or engineering number

There was a separate thick book that was published every 6 months or so that was a cross reference between the engineering and the part numbers. And another book (published about the same number of times of year) that showed what part numbers were no longer used and what could be used (if any) to substitute for them.

What part or engineering number do you need?

[preaction]

I understand the part number you listed for the OP's diverter valve as being correct for my Dearborn, April 67 application I just wanted to identify the valve that I have on my engine; C6AE-9B289-E    L3331-1 as I have a feeling it may match the application that my fan clutch was for.