always replace the tensioner, they get weak. always replace all the guides, they get brittle with age. once they get to root beer brown, it's time. you have to pull the covers off, so valve cover gaskets, also.

oe chain, oe tensioner, oe or goetze gaskets and the febi guides will do fine. the non-oe stuff i mention oe for is not worth it. had a febi tensioner fail on a 117 and luckily caught it in time. too tough a job to do again. good luck, chuck.