Well I'm glad to hear you're puttin' efi on it cause that cam will cause thos vaccume issues. You don't have that much of a problem with that on the efi setup for some reason. Oh, here's a pointer for when you do go efi: restrict the egr passage into the intake. It helps to smooth out the idle with that cam. I did it by making my own gasket out of a coke can and just making the hole in the center much smaller than the hole in the factory egr gasket. -and I'm sure you've already heard of the AFM trick.
