I'm getting ready to add a brake booster to the front disc brake conversion on my '66 C10. I've got a 350 with an Edelbrock performer manifold and it has a large, maybe 5/8" vacuum fitting hole behind the carb. Currently there is a fitting in the hole with a small (maybe 3/16") nipple for an vacuum hose that runs into the cab. I need to replace this fitting with one that has both the small nipple and a larger, maybe 3/8" nipple for the brake booster. So far I've looked at several of the disc brake conversion web sites, NAPA and Auto Zone web sites but have been unable to find one. Anybody know where I can find the double ended, 3/16" and 3/8" fitting I need. Is there another option? From what I've read its best to use vacuum off the manifold, not the carb.
Appreaciate any advice.
Steve
