*Compression ratios listed are from Ford literature and are theoretic figures that exclude deck volume and head gasket displacement. Most compression ratios are approximately 9 percent higher.

When engines are rebuilt with composition head gaskets, deduct about 12 percent for actual compression.

 

 

 

 

 

 

 

 

 

 

 

    
Y-Block Cylinder Head Casting Numbers 

Cylinder head casting numbers can be found under the valve cover on early heads, between the exhaust ports on some heads or under the water passage to the intake manifold. The # 6090 is the Ford code for "cylinder head" it is on all of them and means nothing.

 

Year

Casting No.

Cu. In.

Intake Valve

*C.R.

CCs

Horsepower

Carburetor

Vehicles

1954

EBU

239

1.64"

7.2

 

130

2 bbl

1954 Passenger Car and Half-Ton Truck

1954

EBY

256

1.78"

7.5

 

161

4 bbl

1954 Mercury

1954-1955

EBZ

256

1.78"

     

2 bbl

1954-1955 Heavy-Duty Truck

1955

EBV

239

1.64"

   

130

2 bbl

1955 Half-Ton Truck

1955

EBY

256

1.78"

7.5

 

145

2 bbl

1955 Half-Ton Truck

1955

ECL-A ECG-B

272

1.78"

7.6

 

162

2 bbl

1955 Ford

1955

ECG-D

272

1.78"

7.6

 

162

2 bbl

1955 Ford

1955

ECG-A ECG-C

272

1.78"

8.5

 

182

4 bbl

1955 Ford

1955

ECK-A ECL-A

292

1.78"

7.6

 

162

2 bbl

1955 Ford

1955

ECK-B

292

1.78"

8.1

 

193

4 bbl

1955 T-Bird

1955

ECK-C ECL-C ECL-B

292

1.78"

8.5

 

198

4 bbl

1955 T-Bird, Mercury

1956

ECZ-C

272

1.78"

8.0

 

173

2 bbl

1956 Pickup

1956

ECZ-A

272

1.78"

7.6

 

170

2 bbl

1956 Pickup

1956

ECW-A

272

1.78"

7.6

 

162

2 bbl

1956 Heavy-Duty Truck

1956

ECG-H ECG-R

272

1.78"

8.4

 

176

2 bbl

1956 Ford

1956

ECZ-B EDB-B

292

1.78"

8.0

 

200

4 bbl

1956 Ford

1956

ECZ-C

292

1.78"

8.4

 

202

4 bbl

1956 Ford

1956

ECZ-C

312

1.78"

9.0

 

225

4 bbl

1956 Ford, Mercury, T-Bird

1956

ECZ-A

312

1.78"

8.0

 

210

4 bbl

1956 Police Interceptor, Mercury

1956

ECZ-B

312

1.78"

8.4

 

215

4 bbl

1956 Ford, Mercury

1956

ED-ECZ-C

272

1.78"

8.5

73cc

 

2 bbl

1956 Pickup

 

ECR-D

292

         

Heavy-Duty Truck or International

1957

ECZ-G

272

1.92"

8.6

69cc

190

2 bbl

1957 Pickup

1957

ECZ-G

292

1.92"

9.0

69cc

206

2 bbl

Ford, T-Bird

1957

ECZ-G

312

1.92"

9.7

69cc

245

4 bbl

Ford, Mercury, T-Bird

1957

ECZ-G

312

1.92"

8.0

   

2 or 4 bbl

Ford, T-bird

1957-1958

ECZ-A

272

1.92"

8.0

   

2 or 4 bbl

Heavy-Duty Truck

1957

EDB-D EDB-E

312

1.92"

8.5

82cc

300+

4 bbl

Supercharged

1957

EBC-C Stamped

312

1.92"

         

1958

ECZ-G

292

1.92"

9.1

69cc

205

2 bbl

Early-1958 Production Ford, Pickup

1958

5752-113

292

1.92"

8.8

72cc

200

2 bbl

Ford, Pickup

1958

ECZ-G

312

1.92"

9.7

69cc

235

4 bbl

Mercury

1959

5752-113

292

1.92"

8.8

72cc

200

2 bbl

Ford, Pickup

1959

5750-471

292

1.92"

8.0

82cc

 

2 bbl

Medium, Heavy-Duty Truck

1959

5750-471

312

1.92"

8.7

82cc

210

2 bbl

Mercury

1960

COTE

292

1.64"

8.1

   

2 bbl

Medium, Heavy-Duty and Pickup Truck

1960

COAE

292

1.64"

8.4

75cc

 

2 bbl

1960 Ford

1960

COAE

312

1.64"

8.9

75cc

 

2 bbl

1960 Mercury

1961-1962

C1AE

292

1.64

8.8

72cc

 

2 bbl

1961 and 1962 Ford

1961-1964

C1TE

292

1.64"

8.2

76cc

 

2 bbl

All 1961-1964 Trucks

 

B9TE

292

1.92"

8.0

82cc

   

5750-471 Replacement

 

B9AE

292

1.92"

8.8

73cc

   

5752-113 Replacement

 
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