EngineSpecs

Expanded Blueprint Specs:

The first thing you will notice is a whole lot more data than you get from the NHRA Tech Bulletins pages. That is why individual engines are shown rather than every available engine for the year-make.
The additional data that is not included on the NHRA Tech Bulletins pages is not authorized or approved by NHRA so do not assume that this has the same authority in those areas as the information on the official NHRA Technical Bulletins. The data from the NHRA web Technical Bulletins is included here and every effort is made to ensure that this data is the most up to date information published by NHRA.
An interesting tool is the link on the right side of the page to show all the cars that use the engine you have selected. You will find that information valuable in considering options for class placement for this engine.
You will find all the relavent information from NHRA for accepted replacement parts - pistons, rods, oil pans, etc. - is all located in this one page. You do not have to look anywhere else to find that information.

Engine Blueprint Specifications: 1979 Pontiac 175 HP 403 V8

PONT-79 Issued: 9/25/1979 Last Revised: 6/7/2022 Revisions: 11-12-79, 2-16-98, 7-1-99, 4-7-06 WR, 2-6-08 WR, 9-2-08 WR, 1/1/2022, 6/7/2022

Engine Family: General Motors, Olds V8 Small Block Advertised Comp Ratio: 9.18:1 Induction: 1-4 Bbl Engine Type: V8

Basic Specs:	Bore	Stroke	Main Journal Dia	Rod Journal Dia	Max Bore	Max Stroke	Max Displacement
	4.351"	3.385"	2.500"	2.124"	4.431"	3.400"	419.4 ci

Piston-Rod Specs:	Piston Weight	Comp Height	Pin Weight	Rings	Rings Weight	Rod C/C	Max Rod C/C	Rod Weight	Min Assy Weight
	673 g	1.585"	90 g	5/64, 5/64, 3/16	64 g	6.002"	6.027"	578 g	1405 g

Compression:	Deck Height	Head Gasket	Piston Type	Dome/Dish Vol	Dome/Dish Hgt	Comb Chamber Vol	Max Compression
	.002"	.030"	Dished	-16.98 cc	-0.138"	71.69 cc	9.88:1

Valve Train:	Int Rocker Ratio	Exh Rocker Ratio	Intake Valve	Exhaust Valve	Lifter Type	Spring Type	Lifter Dia.
	1.60:1	1.60:1	2.000"	1.500"	Hydraulic	Outer w/damper	0.842"

Camshaft:	Intake Lift	Exhaust Lift
	.474"	.474"

Cylinder Heads:	Casting No.		Intake Volume	Exhaust Volume
	554717		160.0cc	115.0cc
Edelbrock	60517				Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust.

Intake Manifolds:	Casting No.
	411990	Cast Iron

Number	Manufacturer	Trans	Type	Primary Throttle	Secondary Throttle	Primary Venturi	Secondary Venturi
17059250	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
17059253	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
17059256	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
17059257	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
17059258	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
17059550	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
17059553	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
1903	Edelbrock	ALL	4-Bbl	1.375"	2.250"	1.233"	.000"	AV Secondary. Replacement for GM large venturi Quadrajet. NOTE: Venturi specs include .015" maximum allowable tolerance.

Notes:
	Class Limits	Available with Automatic transmission only

Power Factors:	Stock Auto		S/S Auto		GT Auto		GTFwd Auto
Base Factors	288	7/24/06	255	7/9/08	255	7/9/08	255	7/9/08
w/Rep Heads: Edelbrock #60517 for SS.			265	1/1/14	265	1/1/14	265	1/1/14

Accepted Replacement Pistons for Stock Eliminator

   Effective 7/10/2014
Specs:     Comp Hgt-1.585"    Pin Dia-0.980"    Rings-5/64, 5/64, 3/16
Distance to Top Ring-0.230"    Piston Min Weight-673g

Manufacturer	Part Number

Badger

B411

CP Pistons

O2-CP

Ross

74227

Sterling

466P

TRW

L2451F

TRW

L3067F

Venolia

403

Accepted Replacement Oil Pans for Stock Eliminator

Engine Group - Olds V8 Small Block Effective 5/10/2022

Manufacturer	Part Number

Milodon

30765

Accepted Replacement Connecting Rods for Stock or S/S

Effective 8/23/2023
Specs: C/C Length- 6.002" Min Weight- 600g Journal Dia- 2.124" Big End Dia- 2.225" Pin Dia- 0.980"

Manufacturer	Part Number	C/C Length	Wgt.	Pin Dia.

Carrillo

C350-66000S

6.000"

642g

0.927"

260/307/350/403 Olds

Carrillo

C350-76000H

6.000"

682g

0.927"

260/307/350/403 Olds

Carrillo

C35-K76000

6.000"

684g

0.927"

260/307/350/403 Olds

Childs & Albert

327-06B

6.000"

0.927"

SB Chev Small Journal

Manley

14054

6.000"

705g

0.927"

SB Chev Large Journal

Manley

14103

6.000"

578g

0.927"

SB Chev Large Journal

Manley

14354

6.000"

610g

0.928"

426 Hemi Drag Pak

Molnar Technologies

OH6000TRB8-A

6.000"

312g

0.980"

Probe

10064

6.000"

Summit

SES-3-60L05B600

6.000"

0.927"

SB Chev Large Journal

Trick Flow Specialties

TFS-36600200

6.000"

Carrillo

C350-66000S

6.000"

642g

0.927"

260/307/350/403 Olds

Carrillo

C350-76000H

6.000"

682g

0.927"

260/307/350/403 Olds

Carrillo

C35-K76000

6.000"

684g

0.927"

260/307/350/403 Olds

Childs & Albert

327-06B

6.000"

0.927"

SB Chev Small Journal

Manley

14054

6.000"

705g

0.927"

SB Chev Large Journal

Manley

14103

6.000"

578g

0.927"

SB Chev Large Journal

Manley

14354

6.000"

610g

0.928"

426 Hemi Drag Pak

Molnar Technologies

OH6000TRB8-A

6.000"

312g

0.980"

Probe

10064

6.000"

Summit

SES-3-60L05B600

6.000"

0.927"

SB Chev Large Journal

Trick Flow Specialties

TFS-36600200

6.000"

Note the calculations for actual displacement the maximum actual compression ratio.

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