Low Vacuum Issue/Big cam

Did you degree the cam? What vacuum does it pull? What was done to the distributor? What is the cylinder pressures?

edit.. oops. read too fast..lol

Without knowing the cylinder pressures... It sounds like you have the vacuum can plugged on the wrong port on the carb. I would remove the line from the dist can and plug it for now. Add initial to get 16° initial. Slow the idle down to 800 or less and rebalance the mixture screws. You will need the strip kit for the carb, because the step up springs are probably wrong. You will need to curve the distributor and set up the vacuum can, but it should bea decent package, even if it's a little soft under 2K.