There were a few of these. I remember the name being Orange Julius or Orange Julep. One was on the west side of the Decarie Autoroute near Jean Talon (not far from the Bluebonnets horse track). Another was on the South Shore, near Delson or St Constant, I think. This might be the former, which had car hop service into the 1980s at least. I remember reading a feature in the Montreal Gazette, probably 30 years ago about how the original one was even bigger and that had 2 floors of living quarters above the restaurant on the ground floor!