6 pak run bad cold

hello and thanks again for the input and ideas. Mistake number one was putting on the carbs without even peeking inside. In NJ, we get blessed with oxygenated fuel from Oct to Apr. It has a 10% alcohol blend. That can cause further lean conditions. The carb came with 62 jets in it. The factory recommends 64, I put in 66. Then I set the timing using a vacuum gauge. Got it to 16.5 and backed it to 15 inches. The final tweaks were making the outboards richer. This required setting the front with engine running then removing the center to duplicate the same setting to the rear with engine off. It resulted it a very nice idle. I have done a fair amount of 6 pack work, and this was the most difficult to set up.

Well, thanks again for the help!!! You are all the best!!

Rich