well took the rockers off and swapped with another cylinder so i know it's not the lifter or rocker upon further inspection of the cam lobe on #5 exhaust looks like a worn flat spot on the cam lobe,a lot of miles on that cam and rockers,280,000,so i guess i will try to find a used cylinder head with cam and rocker assemblies and hope the cam and rocker's are better than mine with a lot less mileage,i will keep the head incase i need it later although mine was redone about 30,000 miles ago,new cam is fairly cheap but the rocker's are about 50 bucks each,(OUCH),i think i will be ok with used if the cam lobes look ok,wont know till i find one,we love this car and will keep for a long time.