Hello guys thanks for comments but even if I readjust my idle and go to ported vacuum I still have a miss on the stupid engine. Idle is always steady one way or the other there is no difference wise using ported or full manifold idle is the same either way. Also on my paper work that came with my summit hei it said to hook up vacuum advance to ported so go figure but I know that is a hot debate a lot of times.
From my understanding between the two the only difference is at idle and once you take off and the throttle blades are open and while cruising they both work the same.
I have spent countless hours for the last 5 months or more trying to figure out what is causing my miss that is not constant but happens on a regular basis mostly at idle and it makes my idle rough here and there and seems like it will almost want to quit but it has never gotten that bad. Also with the came swap the intake has been resealed again and intake manifold leak has also been ruled out.
I have had two different distributors in this thing along with 4 different sets of spark plugs, three sets of wires, three different control modules, three different cap and coil combos and more ground wire added to rule out grounding issues. I have checked the voltage to the hei and its around 14 volts when running so its fine there. Charging system is all new.
I have had two different edelbrock carburetors and my current holley on this thing and it is still there. Carburetor is ruled out. All vacuum hookups have all been checked and I just recently un hooked my plug wires on top of my distributor and pulled them up one at a time and they are all firing just fine.
I guess I am getting of topic in this post but I really don't know what else to check anymore or what other options I have to check things for that issue. I am pretty sick of my engine and its sad my brothers old stock 305 which has over 175,000 miles on it can idle smooth and not miss and has over 15 year old spark plugs in the thing.
Thanks custom10 for the link will read more about it.