PUZZLER!!! My new motors a dog! what did I miss?

When you get it back together, find out what the stock carb jets, and needles are, and PUT THEM BACK IN that Carb! From the factory, the carb is jetted a little on the RICH side.

That cam should get you good gas mileage, you say it drinks the fuel! Stock jetting should work GOOD for your combo.

Is it possible that all three carb were not jetted properly to begin with?

I'm not sure the spark plugs are tell you what you thing they are.

You said your eye's were burning, aka "WAY TO RICH" !!!

If you are running a vac advance, remove it, and plug it, for now.

My last thought is that you said it runs like a NOISE /6......LIfter noise? like a lifter is not pumping up? Or pushrod is to long, holding valve open slightly...................

Did you check the lifter pre load when you put the motor together. aka how far the push rod push down into the lifter bore?
If the heads have been shaved previously, your stock push rods my be two Long.