distributer cap mods?

well now i have a bigger issue to find because my miss fire is back again wich i thought i had eliminated, what a freaking nightmare!! Brand new distributer curved and phased, brand new crane cams cd ignition and coil, brand new spark plugs, brand new spark plug wires, brand new cap and rotor and i have a miss fire, how is this even possible? Blows my mind that there is a missfire.
I had been chasing down a miss fire for a very long time previously and found it to be a vaccum leak at my intake manifold, put a brand new intake manifold gasket on it and that cured my plug fouling miss firing issue for almost 2 months and now its back again... Unstable vaccum while its idling, i know this is a miss fire issue, i just dont know where to look next. Compression test yeilds 150psi on every cylinder wich is real good since i am at 4000 feet above sea level. So what in the hell is the issue here? I'm running 15 degrees initial timing 33 degrees total timing with another 10 degrees of timing at an idle from vaccum advance on manifold vaccum. I'm out of ideas