More often than not, the devil is in the tune. So get your T-port synced up, crank about 20 Degrees initial into her with the V-can defeated, hook up the PCV, and try again.
I agree with the above comments. One thing I'd like to ask though. Is the 904 converter properly weighted for the externally balanced 360? That won't cause it not to run but it will cause the 360 to vibrate itself to death