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Old 03-06-2005, 11:54 AM
71chevellepa's Avatar
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chevy pistons

i just tore apart my small block chevy (350). i was trying to identify some of the castin mumbers just so I know what I have. I am going to buy all new pistons and connecting rods, but i would like to know what these pistons were.

The casting number says 6271096, it also says massena on them. Now i am thinking of going with kieth black pistons. If anybody knows what that number is or they have a better sugestion on new pistons please give me some knoledge.

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Old 03-06-2005, 04:41 PM
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BUICK
Cyl.
Engine
Bore Years
Comp.
Ratio NOTES: Part No.
Sizes Rings O.E. Assy.
No. O.E. Casting
No. Head
Shape
V8 307
5.0 L
3.800(IN)
96.5(MM)

OLDSMOBILE
ENGINE 1980-84

7.9 2.70" dia. head recess .107" deep.

APPROXIMATE HEAD VOLUME=9cc

Comp. Ht. 1.595
Pin Dia..9805 offset 1636
Std.
.020
.030
.040
.060 2-5/64
1-3/16 22506658 22504964
V8 307
5.0 L
3.800(IN)
96.5(MM)

OLDSMOBILE
ENGINE 1985-90

8.0 Recessed head .270" deep. Broken sets factory only.

APPROXIMATE HEAD VOLUME=15.5cc

Comp. Ht. 1.605
Pin Dia..9805 Offset 1639LR
Std.
.020
.030
.040
.060 2-5/64
1-3/16 22527480(R)
22527479(L) 22527033
V8 340
5.6 L
3.750(IN)
95.25(MM)

BUICK
ENGINE 1966-67

8.4 3.06" dia. head recess .23" deep.

APPROXIMATE HEAD VOLUME=26cc

Comp. Ht. 1.835
Pin Dia..9398 Offset 1724
Std.
.020
.030
.040
.060 2-5/64
1-3/16 1395184 1374154
V8 350
5.7 L
3.800(IN)
96.52(MM)

BUICK
ENGINE 1968-81

8.7
8.6
8.0
8.4 3.05" dia. head recess .215" deep.

APPROXIMATE HEAD VOLUME=24.5cc

Comp. Ht. 1.805
Pin Dia..9398 Offset 1731
Std.
.020
.030
.040
.060 2-5/64
1-3/16 1394208
1394558
1249538
22501423
25527178 1382128
1231899
1247241
1255672
25522904
25519456
V8 350
5.7 L
3.800(IN)
96.5(MM)

BUICK
ENGINE 1968-81

8.5 Hypereutectic, destroked .020". 3.05" dia. head recess .235" deep.

APPROXIMATE HEAD VOLUME=25.5cc

Comp. Ht. 1.805
Pin Dia..9398 Offset H1740
Std.
.020
.030
.040
.060 2-5/64
1-3/16 1249538
1394558
25501423
1394208
25527178 1247241
1231899
1255672
1382128
25522904
25519456
V8 350
5.7 L
4.000(IN)
101.6(MM)

CHEVY
ENGINE 1977-79

8.1 VIN L. 3.16" dia. head recess .08" deep 4 valve reliefs. Use 1986 & earlier rings only.

APPROXIMATE HEAD VOLUME=13cc

Comp. Ht. 1.540
Pin Dia..9273 Offset 1470
Std.
.020
.030
.040
.060
.080 2-5/64
1-3/16 6271097
3991488
10159424 6271096
3991476
10128212
V8 350
5.7 L
4.000(IN)
101.6(MM)

CHEVY
ENGINE 1977-79

7.9 Hypereutectic, destroked .020". 3.14" dia. head recess .07" deep with 4 valve reliefs. Use 1986 & earlier rings. NOT INTENDED FOR RACE APPLICATIONS.

APPROXIMATE HEAD VOLUME=12cc

Comp. Ht. 1.560
Pin Dia..9273 Offset H1476
Std.
.020
.030
.040
.060 2-5/64
1-3/16 3991488
6271097
10159424 3991476
6271096
10128212
V8 350
5.7 L
4.000(IN)
101.6(MM)

CHEVY
ENGINE 1990-95

9.3 Hypereutectic flat head with 4 valve reliefs. Piston destroked .020".

APPROXIMATE HEAD VOLUME=7cc

Comp. Ht. 1.540
Pin Dia..9273 Offset H1489*
Std.
.020
.030
.040
.060 1-2.0mm
1-1.5mm
1-4.0mm 10159436
10128452 T0Z2110V13
10128454

* NEW PISTON, AVAILABLE NOW
**NEW PISTON, CHECK FOR AVAILABILITY
Page 15

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Old 03-06-2005, 11:57 PM
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thanks 4onthefloor 2

thanks for the knoledge. Now i am thinking of going with eagle rods that are rated up to 500 horse, and kieth black pistons. along with this I want to go with the edelbrock perfromer RPM package. you know the heads the cam, intake and so on. Does this sound like a good combo, or does somebody have a better combo for me that might even be cheaper?
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