I need help finding a vacuum port for 1978 F250 400.

It is the on that comes of the manifold and hooks into a 1/8" vac line. This would be in front and to the left of the Carb. It has an 11/16" base that screws into the manifold.

Mine has been broken and I cant seem to be able to find a replacement any where.

If anyone has one or can find one please let me know.

 

Check auto parts stores like napa, summit racing, or hardware stores even home depot in plumbing.

 

Thanks will do that.

 

Try Hobby Lobby and Michael's craft stores for brass tubing.

Model railroad hobby shops will also have tubing.

 

Are you talking about the line with a compression fitting on the end that connects to the choke housing on the carb to the intake manifold ?