OMG need help fast

tomarrow i am first putting an alternator on a dodge intrepid then i am starting the ole girl and checking the lift of the rockers since i already pulled the valve cover lol hopefully they both open and close the same as the number 4 cyl. if thats the case then were on too the timing chain set ..... but i'm fearful the cam might have wore on them lobes ..... it just keeps jumpin thru my mind.... ok i'ma go vomit now lol