Style chooser

sup all- got a 4g93 sohc out of a 93 eagle summit dl. replaced head gasket and timing belt. got timing belt on marks lined up start car all is good but engine vibrates at idle. Read in manual that silent shaft could be 180 off causing this but what i not understanding is how to verify this or how to fix it seems to me that the tensioner is what needs to be adjusted but it just bolts into the block so i confused. help please. thanks in advance.