Hi Denny---Thanks a million for the marked up quadrajet pictures----just one thing---I am running a stock 1985 HEI distributor, and I think I know what Henry Rifle is talking about in terms of "ported vacuum" and wanting a port above the throttle plates for the vacuum advance on the distributor. Only thing is, the port which you point out for "vac advance" on the mark up is below the throttle plates. Can you please clarify that point for me?