Hope this helps..... Had it stashed in my favorites.
According to this Ford Casting Number system,
E4AE-1984
Ford Full Size Car
Engine
6015-Basic Part Number
351 Windsor block
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Ford Part Numbers are divided into 3 sections:
a) Prefix, b) Basic Part Number, and c) Suffix.
a) The 4-digit Prefix breaks down as follows:
1. The 1st digit of the Prefix is the decade, for example:
A = 1940s, B = 1950s, C =1960s, D = 1970s, etc.
2. The 2nd digit of the Prefix is the year within the decade,
for example:
1 = 1st year, 2 = 2nd year, etc.
3. The 3rd digit of the Prefix is the model, for example:
A = full-size, D = Falcon (later Maverick), F = foreign/
Trans Am racing,
G = Comet (later Montego), H = Holman & Moody HiPo parts, J = industrial,
L = Lincoln, M = Mercury, O = Fairlane (later Torino), P = Autolite
(Motorcraft), R = Rotunda (generic), S = Thunderbird, T = truck,
U = Econoline/Club Wagon van, V = Lincoln, W = Cougar and Z = Mustang.
4. The 4th digit of the Prefix is the Engineering Department,
for example:
A* = Chassis, B* = Body, E* = Engine, F* = Engine Accessories,
J* = Autolite, P* = Automatic Transmission, R* = Manual Transmission,
and W* = Axle.
NOTE: * = Used in Casting Part Numbers (see below for more details)
M** = Holman & Moody Service Parts, X** = Muscle Car Parts,
Y** = Lincoln/Mercury, Z** = Ford.
NOTE: ** = Used in Service Parts Part Numbers (see below for more details)
b) The Basic Part Numbers are divided into numerical groups, for example:
1000 = Wheels, 2000 = Brakes, 3000 = Suspension & Steering,
4000 = Axle & Driveshaft, 5200 = Exhaust, 5300-5400 = Front Springs &
Stabilizer, 5500-5900 = Rear Springs, 6000 = Engine, 7000 = Transmission,
8000 = Radiator, Grille, Cooling & Belts, 9000 = Fuel/Oil Gauges,
10000 = Charging & Instruments, 11000 = Starting, 12000 = Ignition,
13000 = Lamps & Horn, 14000 = Wiring, 15000 = Accessories,
16000= Molding & Ornaments, 17000 = Safety Equipment (Jack, Speedometer,
Washer, Wipers, Mirrors, Bumpers), 18000-18100 = Shocks,
18200-18700 = Comfort-Convenience Equipment (Floor Mats, Heater, etc.),
18800 = Radio & Antenna, 18900 = Speakers, 19000 = Gasoline,
19100 = Fire Extinguishers, 19500 = Custom Accessories & Car Care,
19600-19900 = Air Conditioning, etc.
Note: Even Basic Part Numbers denote right hand (passenger) side parts,
while odd Basic Part Numbers denote left hand (driver) side parts.
c) The Suffix denotes the change level, for example:
A = 1st change level, B = 2nd change level, Z = 26th change level,
AA = 27th change level, etc.
I could use help decoding a ford block 
