Not sure if the base circle on the 509 cam is the same as the one you were running, but anytime you go over a half inch lift the rocker arm to valve stem contact pattern should be checked, as the rocker arm tip is often no longer centered on the valve stem as it travels through it's lift cycle - which necessitates a change in pushrod lengths, shimming the rocker shafts, etc. It should at least be checked along with rocker arm to valve spring retainer clearance. BTW, a non-roller tip rocker arm does not negate this problem. Although incorrect valve train geometry has many bad side affects, don't think it's your 3-5" vacuum and 140 cranking PSI problems. Did I mention your fuel line is too small - - - - -!