Not Sure as it doesnt specify if it is 1V or 2V but Ive just checked a 1977 Mk2 Escort Ford Workshop Manual for the L, GL and GHIA & it states that the the 1600 OHV motor that is used.
So if this is any help the Valve Clearances for this motor are
Inlet - 0.20 mm (0.008 in.)
Exhaust - 0.55 mm (0.022 in.)