Yup, there were 4 Funks vs Abby/Sheik 2 vs 2 Tags:
13.12.1979 All Japan Pro Wrestling Real World Tag League 1979: The Funks (Dory Funk Jr. & Terry Funk) defeat Abdullah The Butcher & The Sheik (17:15) AJPW Real World Tag League 1979 - Tag 13 @ Kuramae Kokugikan in Tokyo, Japan 15.07.1979 All Japan Pro Wrestling Tag Team Two Out Of Three Falls: The Funks (Dory Funk Jr. & Terry Funk) vs. Abdullah The Butcher & The Sheik - Draw (18:23) AJPW Summer Action Series 1979 - Tag 9 @ Shinagawa Prince Hotel Gold Hall in Tokyo, Japan 09.12.1978 All Japan Pro Wrestling Real World Tag League 1978: Abdullah The Butcher & The Sheik defeat The Funks (Dory Funk Jr. & Terry Funk) by DQ (12:29) AJPW Real World Tag League 1978 - Tag 9 @ Kuramae Kokugikan in Tokyo, Japan 15.12.1977 All Japan Pro Wrestling Open Tag League 1977 Final: The Funks (Dory Funk Jr. & Terry Funk) defeat Abdullah The Butcher & The Sheik by DQ (14:40) AJPW World Open Tag Team Championship Tournament - Tag 13 @ Kuramae Kokugikan in Tokyo, Japan
The incorrect 9/19/78 date drove me nuts as well last year when I was trying to hunt down these matches.
They are all available on The Archive in full. Of course, there are other matches that tie into this fued (singles, 3 vs 3's, etc) but to me these 4 are head and shoulders above the rest.
