Headlights worked great before in stalling a .458 lift with 218 duration cam in a 350 block. Would i loose that much vaccume with such a small cam? How much vaccume should there be at the acuator? What was factory vacume specs at acuator. thanks

Not sure on the specs but I have a cam with .480 lift and .230 duration in a 350 and I'm still pullin enough vac to operate my doors. Sure you don't have a leak? They are touchy! Get yourself a vac gauge and see how much vac you have, will also tell you if you have a leak somewhere.