I am adding this to the previous Shock Theatre Timeline.
Update : March 19, 2013
April 24,1982 - Currently I have information that indicates that Shock Theatre on WGHP 8 ended on this date with "DoomWatch" (1972) starring Ian Bannen and Judy Geeson.
May 8, 1982 - WXII 12 in Winston-Salem, NC began it's own version of "Shock Theater" with channel 12 writer Paul Iacono and director Tim Whitt as hosts. The first movie was "Dr. Phibes Rises Again" with Vincent Price.
November 20,1982 - "Shock Theater" on WXII 12 ends with "Shock Waves" (1972) starring Peter Cushing.
I have not yet been able to determine whether WGHP 8 brought 'Shock Theatre" back to it's schedule anytime after this. I keep searching.