76 kz 400 cam chain tensioner cover

anybody know where i could get a new cam chain tensioner holder and cover?...i cant seem to get mine apart.i just got this 76 kz 400. its running great now that i adjusted the points and cleaned them and put new plugs in it. starts first kick now.i also adjusted the clutch and changed the oil but i think i hear the cam chain. sounds like it is stretched a little.but i cant get the cover apart from the holder. i tried putting it in a vise today but didnt want to tear up the whole thing and not be able to get a replacement.so if anybody has any info for me i would appreciate your input.

Your terms for the parts are not to clear. There is usually a housing that contains the parts that help put tension on the chain. Pictures?

Also you can put all that info in a signature
76 kz400 orange
ohio

the housing is what i cant get to come apart from the base.so ill probably need the base and housing as a new part so it will come apart.i took the base loose from the engine with the housing still attatched put it on a vise and still it wouldnt budge.