I recently put on a edelbrock 573 with 94's, I found the correct plugs for the outer carbs but can't seem to find the fitting to go to a hose for vacuum advance on distributer, the threads are 3/8-24, does anyone know what hose barb to use or where I can get one, thanks again for the help

The carburetor will need to be modified to produce the correct vacuum signal for the distributor.  See here for instructions:

http://www.eatonbalancing.com/blog/2010/02/07/modifying-the-holley-94-two-barrel-for-late-model-distributors/ 

Or, you can use manifold vacuum, in which case, you may be able to use an existing port on the manifold or you can get a carb spacer with a port or get a spacer without a port and drill / tap for a nipple.


Lawrenceville, GA

thanks Charlie, that's great info