1966 GMC 305 V6 Service

[TommyDuncan]

Originally Posted by awbrown

rufton , what port do you have the vacuum on now ?? From what you are telling us it looks like it is on the ported vacuum , it should be on manifold vacuum .. all the vehicles I have had got much better milage on manifold vacuum than ported...

Anyone else have an opinion on this?
The Holley PDF says to connect it to ported. I tried both but I made so many changes at once that I haven't figured it out yet.