[Jim Kellogg]

It apeears that you DO have a 1994 block by that casting#
F=1990-1999 (decade)
4= (year)
F4 = 1994 casting

More info here...
PART NUMBER DECODE


First Character
Year
C=1960
D=1970
E=1980
F=1990
etc.


Second Character
Year in the decade


Third Character
Car line
A=Full size/Galaxy
B=Bronco (70-75)
C=Torino/Elite
D=Falcon (60-69)
F=Outside US
G=Comet (61-68)
Montego (69-76)
H=Med./Heavy Truck
J=Industrial
L=Lincoln(58-60)
M=Mercury
O=Fairlane (62-68)
Torino (69-76)
R=Capri
S=Thunderbird
T=Truck
U=Lincoln(61-up)
V=Lincoln
W=Cougar
Z=Mustang
HM=Holman-Moody
3A635=P/S kit
4000--4599=Rear axle
4600-4999=Driveshaft
5000-5199=Frame
5200-5299=Muffler
5300-5399=Front springs
5310=Spring chart
5400-5999=Stabilizers
6000-9999=Engine ID tag/pulley ID chart
6900-7999=Manual trans-exc. linkage
7000-7299=Manual trans linkage, etc
7300-7499=Manual trans linkage, etc
7500-7999=Clutch
7000-7999=Auto trans - exc. linkage
7000-7199=Auto trans linkage, cooling, etc
7200-7399=Auto trans linkage, etc
7400-7999=Auto trans linkage, etc
8000-8499=Radiator, grill, cooling
8500-8599=Water pump
8600-8999=Fan
8620=Drive belt chart
9000-9299=Fuel tank & lines
9300-9399=Fuel pump, gauge

Forth Character
Series code
A=Chassis
B=Body
E=Engine
M=Motorsports
X=Muscle Parts
Y=Lincoln/Mercury
Z=Ford Parts & Service
9400-9499=Manifolds, t-stat, emission
9500-9599=Carburetor
9500-9999=Carb parts/lists
9600-9699=Air cleaner and related
9700-9999=Choke, accelerator, speed control
10300-10599=Alternator, pulleys, mounting
10600-10999=Battery, instrument cluster
11000-11999=Starter, ignition, headlamp sw
12001-12999=Coil, distributor, plugs
13000-13999=Headlamps, parking ,turn ind.

Hope this helps,
Jim