Back in the late 70s I was a Nav Rad on a number of ICC sorties (Co-pilot to Captain conversions) during which low-speed handling was demonstrated. I recall that if the drivers (airframe) increased the AoA progressively, at about 108 kts the fin became blanked and the aircraft dropped a wing, thus terminating the manoeuvre.
However, during airshows we regularly saw 80 kts KIAS during wingovers and had to accelerate to pattern speed for the final landing.....