[Frank Messina]

I agree with what Zoom has advised. I would stick with the pink cams and make sure you have them adjusted so that you get fuel out of the discharge nozzles at the slightest throttle movement. Start off in hole 1 and if you need a litle more pump shot go to hole # 2. In a light car like a Cobra it's doubtful you would ever need a 50CC accelerator pump. Adjust your idle mixture ( secondary idle mixture screws will be 1/4 to 1/2 out from lightly seated) and take an idle vacuum reading as soon as you can to determine correct power valve opening point. You can use either 1/2 idle vacuum or 1/2 plus .5 as your formula. Your choice, both work. Make certain your floats are adjusted so that fuel just runs out of the sight plug hole at idle and is not shaking or splashing out if you have a big cam. A low float level will delay startup of the main jets and give you that "dip". Go back to the #25/28 shooters Zoom suggested. Once you get those items squared away you'll only be working on fine tuning the jetting. Number 73's all the way around is a good starting point although I'm guessng # 70's on the primaries is going to be real close.
HTH.
Frank