I have the Eddy 500cfm and the eddy 750. If you put your foot down, maybe you need some more fuel. Is your accelerator pump linkage on the middle hole? Try readjusting it to the bottom hole, it will allow more fuel to come in. Your jets/rods would be another question. They are usually pretty good from the factory but you have some fine tuning in your future to perform. Are there any vacuum leaks? Is the back port on the carb sealed? I have vacuum lines coming off mine and maybe you have a fray or crack in yours. I have but one car and I saved up some cashola to buy an Air/Fuel readout so I can fine tune the carbs.

If you have another carb as you say...doesn't hurt to spend 15 minutes and take it off the other car, all the fuel lines will hook up the same way too.

How many miles you have on that cam? Hydraulic? Solid? If you think its the cam I dunno how to go about checking it. It'd be the blind leading the blind...maybe pull a lifter and check the bottom for damage