Evenin' all - Currently in rebuild mode & have lost my timing notes - I've the humble #TH6 Kent unit with a 108 dg. lobe center, 284/284 duration @ .020" (244 duration @ 105 deg. @ .050") Street spec timing is 108 deg. (strght. up) Am 'assuming' that one wants a 2-4 deg. retarded, but not sure & open to suggestions. Thanks! Kev Lynch