G.M.C. TRUCK
Cyl.
Engine
Bore		 Years
Comp.
Ratio		 NOTES: Part No.
Sizes		 Rings O.E. Assy.
No.		 O.E. Casting
No.		 Head
Shape
V8-396
6.5L
4.094(IN)
104(MM)

CHEVY
ENGINE
1965-69

9.6
Used in either left or right cylinder bank, 3/16" high crown.

Comp. Ht. 1.747
Pin Dia..9898 Offset
1433
STD.
.020
.030
.040
.060
2-5/64
1-3/16
3878227
3878228
3856247
3856248
V8-396
6.5L
4.125(IN)
104.8(MM)

CHEVY
ENGINE
1970

9.3
Used in either left or right cylinder bank, .132 high crown. Use Std. size for .030" oversize 396 application. Not destroked.

Comp. Ht. 1.747
Pin Dia..9898 Offset
1445
STD.
.020
.030
.040
.060
2-5/64
1-3/16
3969981
39669975
V8-400
6.6L
4.125(IN)
104.8(MM)

CHEVY
ENGINE
1970-80

8.5
Small Block engine, 3.46" dia. head recess .145" deep.

APPROXIMATE HEAD VOLUME=20cc

Comp. Ht. 1.540
Pin Dia..9273 Offset
1443
STD.
.020
.030
.040
.060
2-5/64
1-3/16
3972160
3991457
329245
3951542
3989018
329244
V8-400
6.5L
4.125(IN)
104.8(MM)

CHEVY
ENGINE
1970-80

9.2
Small Block engine, .075" step down head with two valve reliefs. Singles from factory only. Not destroked.

APPROXIMATE HEAD VOLUME=2cc

Comp. Ht. 1.560
Pin Dia..9273 Offset
1473LR
STD.
.020
.030
.040
.060
2-5/64
1-3/16
3991457
3989018
V8-402
6.6L
4.125(IN)
104.8(MM)

CHEVY
ENGINE
1970-72

8.3
Big Block engine, .132" high crown. Piston may be used in either left or right cylinder bank. Not destroked

Comp. Ht. 1.747
Pin Dia..9898 Offset
1445
STD.
.020
.030
.040
.060
2-5/64
1-3/16
3969981-2
3993861-2
3969975-76
3993849-50
V8-427
7.0L
4.250(IN)
108(MM)

CHEVY
ENGINE
1966-69

9.5
.140" high crown. Piston may be used in either left or right cylinder bank.

Comp. Ht. 1.750
Pin Dia..9898 Offset
1434
STD.
.020
.030
.040
.060
2-5/64
1-3/16
3888327-8
3869967-8
3925579-80
V8-427
7.0L
4.250(IN)
108(MM)

CHEVY
ENGINE
1968-84

8.0
Flat head with one valve relief.

APPROXIMATE HEAD VOLUME=1cc

Comp. Ht. 2.160
Pin Dia..9898 Center
1440D
STD.
.020
.030
.040
.060
1-3/32
2-5/64
1-3/16
Iron Top
Groove
3893251
3874816
V8-427
7.0L
4.250(IN)
108(MM)

CHEVY
ENGINE
1968-84

8.0
Hypereutectic flat top with one valve relief. #discontinued upon depletion of stock.

APPROXIMATE HEAD VOLUME=1cc

Comp. Ht. 2.160
Pin Dia..9898 Center
H1498#
STD.
.020
.030
.040
.060
1-3/32
2-5/64
1-3/16
3893251
3874816
* NEW PISTON, AVAILABLE NOW
**NEW PISTON, CHECK FOR AVAILABILITY
Page 57

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