They will be UNF pal...

ENGINE & GEARBOX
Crossflow engine bolts (in block): 5/16 UNC.
Crossflow 1300-1600 flywheel bolts: 3/8 UNF.
crossmember to body - 3/8 unf
Pinto spark plug thread: M18x1.5.
Pinto oil pressure switch: 1/4 NPT (pipe thread).
Pinto alloy sump to engine bolts: M6x18
Pinto alloy sump plug: M12x20
RS alloy bellhousing bolts: M10x1.5 (30mm long).

AXLE & PROP
Propshaft to Atlas/English axle bolts: M10x1.0mm pitch.
Drum brakes to english axle Mk1: 7/16 UNF.
Drum brakes to english axle Mk2: M12x1.5.

Pinto:
spark plug thread: M18x1.5.
oil pressure switch: 1/4 NPT (pipe thread).
alloy sump to engine bolts: M6x18
alloy sump plug: M12x20
bellhousing bolts: M10x1.5 (30mm long).

1300-1600 flywheel bolts: 3/8 UNF.

SUSPENSION & BRAKES ETC
MK1 rack-to-crossmember bolts - 5/16 UNC (18tpi)
Caliper to strut bolt (2.8i strut): 7/16 UNF.
Disc to hun bolts 2.8/RS hubs: 3/8 UNC.
Mk1 Escort wheel studs: 7/16 UNF.
Mk2 Escort wheel studs: M12x1.5.
Group 4 wheel studs: 1/2 UNF.
Bilstein competition/Escort RS front insert bottom thread: M10x1.0mm.

BODY/MISC
Escort seatbelt mounts: 7/16 UNF
Crossmember to body - 3/8 UNF
Mk2 Escort - most bolts are M8 (ie bonnet, boot, hinges, etc)