Engine Blueprint Specifications: 1973 Pontiac 250 HP 455 V8
PONT-73
Issued: 3/9/1973
Last Revised: 4/3/2012
Revisions: 7-21-78, 1-1-08 WR, 6-18-08 WR, 4/3/12 PC
Engine Family: General Motors, Pont V8 Late
Advertised Comp Ratio: 8.80:1
Induction: 1-4 Bbl
Engine Type: V8
Accepted Replacement Pistons for Stock Eliminator
Effective 1/9/2023
Specs:
Comp Hgt-1.470"
Pin Dia-0.980"
Rings-5/64, 1/16, 3/16
Distance to Top Ring-0.270"
Piston Min Weight-535g
Accepted Replacement Oil Pans for Stock Eliminator
Engine Group - Pont V8 Late
Effective 5/10/2022
Accepted Aftermarket Crankshafts
|
Eagle |
4.45542E+11 |
Pontiac 455 |
|
Accepted Replacement Blocks
Accepted Replacement Connecting Rods for Stock or S/S
Effective 8/23/2023
Specs:
C/C Length- 6.625"
Min Weight- 760g
Journal Dia- 2.249"
Big End Dia- 2.375"
Pin Dia- 0.980"
Manufacturer |
Part Number |
C/C Length |
Wgt. |
Pin Dia. |
|
|
Carrillo |
C427-76635S |
6.625" |
834g |
0.990" |
Pontiac |
|
Carrillo |
C427-A76635H |
6.625" |
787g |
0.990" |
Pontiac **Discontinued** |
|
Carrillo |
P-455-SS |
6.631" |
760g |
NA |
SUPER STOCK ONLY |
|
Carrillo |
P-455-SS (2) |
6.625" |
760g |
0.000" |
Super Stock Only |
|
Childs & Albert |
389-12 |
6.625" |
NA |
0.947" |
Pontiac |
|
Crower |
F91059 |
6.625" |
NA |
0.981" |
Pontiac |
|
Crower |
ML93015B5 |
6.624" |
773g |
NA |
SUPER STOCK ONLY |
|
Crower |
SP93419 |
6.625" |
830g |
0.947" |
Pontiac |
|
Eagle |
CRS-6625P3D |
6.625" |
760g |
0.947" |
Pontiac |
|
Eagle |
CRS6635 |
6.635" |
830g |
0.990" |
BB Chev |
|
Manley |
14168 |
6.635" |
830g |
0.990" |
BB Chev |
|
Molnar Technologies |
PH6625WRB8-A |
6.623" |
769g |
0.980" |
|
|
Oliver |
ORPPONT6625 |
6.625" |
NA |
0.981" |
Pontiac |
|
Oliver |
P6225PONT |
6.625" |
790g |
0.980" |
Pontiac |
|
Oliver |
P6625PONTFR8 |
6.625" |
819g |
0.980" |
Pontiac |
|