Since yesterday started out a crappy day, I had a chance to look over my Service Manuals but couldn't find what I was looking for.

I have a power brake booster that I want to install in my manual brake 1 bbl cammer. I've been looking for a diagram or picture for the location of the intake manifold port, and what was used (hose, steel tube) to plumb the brake booster.

No luck, can anyone help?

Do you have a bolt in a threaded hole in the top of your intake right by the throttle bracket? If unused, you can tap this port for manifold vacuum.

Just use a threaded pipe nipple of the appropriate thread and barb size to fit a rubber hose to your booster's check valve.

There's two ports on the side under the carb, along with the port on top for the PCV.





The plug with the square drive is nether 1/4" or 3/8", so getting it out will be a challenge. The port with the 90° fitting can be used, if I can find a 1/8" MPT to 3/8" hose barb fitting.

I had a '69 1bbl intake that had a boss on top, by the #6 cylinder, that was drilled and tapped for a fitting. It had a bolt screwed into it. Does yours have a tapped hole there?

I thought that was for a bracket, but you're right, it's threaded through.



It's 1/8" MPT as well, and I'm having trouble finding a 1/8" MPT to 3/8" hose barb fitting.

BrassCraft 125-6-2 straight 3/8" x 1/8" M.I.P.
BrassCraft 129-6-2 90 degree 3/8" x 1/8" M.I.P.

Available at most good hardware stores and plumbing shops.

I've been to Lowes, Home Depot and a couple of auto parts stores, no luck. Thanks for the BrassCraft #! I'm not finding anything on-line yet.

Found'em! It will cost more to ship them than the fittings. I'm getting the straight and 90°, just in case the routing turns out better one way over the other. Thanks again Vikki!

D'oh! Do you have a better search engine than Google? Oh well, to late now. Already ordered'em.

Tom ,I know I saw the picture somewhere let me find it. From my memory I believe the vaccum comes from the side of the manifold with the tee, not the top.