Looking for ideas for a vacuum source

[kspageddie]

I have run into yet another problem. I need to find a vacuum port for my DII conversation and my PVC valve. I was going to use manifold vacuum for both. But, here is my problem. I can not find a fitting to go into the intake. What is in the intake is a 1/2 by 13 pitch bolt. I am not sure if this is orginal or was re-threaded by the prev. owner. I have search darn near everywhere and can not find a fitting to use. Every brass fitting is NPT and will not work.

I have a three one barrel set up that was made by the previous owner. I am running three Autolite 1100 carbs and the only carb vacuum is the SCV. From what I have read, I can not use that for my vacuum on my Duraspark. With the three carbs, I no longer have the carb spacer plate to use for vacuum. I was thinking about finding an old carb spacer plate and see if I could use that, not sure if that is the route to go. So I am not sure what to do. Do you guys have any ideas?

 

[mustang652]

Doing the same project. As the answer i found is a little confusing, I emailed you my solution.

 

[ludwig]

My otherwise stock Stang came with a funny little three-way brass block out of the intake manifold below the carb. The dizz comes off of one end, the AT off the other and there is a little stub of hose with screw on the last one. I use this as the vacuum outlet when I use the vacuum guage and I don't have to take anything else off.
Seems to me you could re-tap the hole and stick in an inside/outside adapter with the thread you want to match on the inside, then a little two or three-way fitting like I have.

 

[Anonymous]

My otherwise stock Stang came with a funny little three-way brass block out of the intake manifold below the carb. The dizz comes off of one end, the AT off the other and there is a little stub of hose with screw on the last one. I use this as the vacuum outlet when I use the vacuum guage and I don't have to take anything else off.
Seems to me you could re-tap the hole and stick in an inside/outside adapter with the thread you want to match on the inside, then a little two or three-way fitting like I have.

I think that brass block is stock. My 66 200 motor from a mustang had the same block.

 

[buzzA4]

I just installed an E0 head and had the same problem. I searched the internet for an auto parts solution with no luck and then.... :idea:

I found a brass 3/8" elbow fitting at Lowe's $1.98 and then inserted a brass 3/8"x 1/4" I.D. adapter to fit a short piece of hose to run over to the AT vacuum line.

The elbow looks alot like the one off my C6 head but larger. I am using a cliffy adapter that has a port for the PCV vacuum. But I am sure you could find a tee fitting at Lowe's to provide 2 vacuum sources.

Hope that helps.

 

[kspageddie]

I went to Home Depot today. A few 1/4 brass fitting fixed my problem. I now have a place to hook my PCV valve to (which it did not have before I bought the car) and a place to hook up my vacuum advance to.

mustang652 was a great help. Thank you for the pics you sent! Thanks everyone.