I have a freshly rebuilt 390 FE engine. It is basically stock with the exception of a Comp Cams 270H hydraulic cam, an Edelbrock Performer intake and edelbrock 650 cfm carb. The inginition is stock Ford electronic. With 6 degrees initial advance (set by vacume line unhooked and plugged) and the vacume advance hooked to the ported vacume line, she idles sloppy and is sluggish at low speeds. Things improve with 12 degrees initial advance, but she tends to want to kick back on the starter some and tends to pings when put under load at slow speed. My question, should I hook the vacume line to the unported vacume or the ported vacume line? Ford says the ported one I think? How about it Ford guys?