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: 1965 Chevrolet 365 HP 327 V8

CHEV-65 Issued: 3/19/1965 Last Revised: 3/18/2024 Revisions: 7-21-78, 1-9-93, 10-15-02, 5-22-03, 10-11-04, 11-10-05 WR, 4-26-06 WR, 5-2-07 WR, 1/1/14 PC, 2--6-2020, 3-26-2020, 1-27-2021, 1/1/2024, 3-18-2024

Engine Family: General Motors, Chev V8 Small Block Advertised Comp Ratio: 11.00:1 Induction: 1-4 Bbl Engine Type: V8

Basic Specs:	Bore	Stroke	Main Journal Dia	Rod Journal Dia	Max Bore	Max Stroke	Max Displacement
	4.001"	3.250"	2.300"	2.000"	4.081"	3.265"	341.7 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
	565 g	1.650"	80 g	5/64, 5/64, 3/16	54 g	5.700"	5.725"	520 g	1219 g

Compression:	Deck Height	Head Gasket	Piston Type	Dome/Dish Vol	Dome/Dish Hgt	Comb Chamber Vol	Max Compression
	.002"	.018"	Dome	5.30 cc	0.120"	58.6 cc	12.72:1

Valve Train:	Int Rocker Ratio	Exh Rocker Ratio	Intake Valve	Exhaust Valve	Lifter Type	Spring Type	Lifter Dia.
	1.50:1	1.50:1	2.023"	1.605"	Solid	Outer w/damper	0.842"

Camshaft:	Intake Lift	Exhaust Lift
	.485"	.485"

Cylinder Heads:	Casting No.	Intake Volume	Exhaust Volume
	3782461	165.0cc	65.0cc
	3782461X	172.0cc	64.0cc
	3849820	165.0cc	65.0cc	Not official NHRA data, but from a reliable source.
	3890462	165.0cc	65.0cc
	3917291	165.0cc	65.0cc
	3927186	165.0cc	65.0cc
	3947041	165.0cc	65.0cc	Port volumes based on "X" head.
	3973414	165.0cc	65.0cc
	3991492	165.0cc	65.0cc
Dart	10021070	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only
Edelbrock	60617	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only.
Edelbrock	60637	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only.
Edelbrock	60887	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only.
Edelbrock	60947	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only.
RHS	12400	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only
RHS	12402	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only
World Products	043600	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only
World Products	043610	172.0cc	65.0cc	Same runner cc's, chamber cc's, valve sizes as the OEM head being replaced, intake & exhaust. SS only

Intake Manifolds:	Casting No.
	3844461	Aluminum

Carburetors:	Number	Manufacturer	Trans	Type	Primary Throttle	Secondary Throttle	Primary Venturi	Secondary Venturi
	R-2818A	Holley	SM	4-Bbl	1.562"	1.562"	1.250"	1.313"	Corvette only

Notes:
	Class Limits	Available with Manual transmission only

Power Factors:	Stock Man		S/S Man		GT Man		GTFwd Man
Base Factors	315	12/5/05	340		340		340
w/Rep Heads: RHS 12400 , 12402; Dart 10021070; World Prod 043600, 043610; Edelbrock 60887, 60947, 60637, 60617	320	1/1/18	345		345		345

Accepted Replacement Pistons for Stock Eliminator

   Effective 9/18/2022
Specs:     Comp Hgt-1.650"    Pin Dia-0.927"    Rings-5/64, 5/64, 3/16
Distance to Top Ring-0.230"    Piston Min Weight-565g

Manufacturer	Part Number

CP Pistons

C25-CP

170774

Ross

78671

TRW

L2166NF

Venolia

327-350

Accepted Replacement Oil Pans for Stock Eliminator

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

Manufacturer	Part Number

Champ Pans

CP40

Milodon

30401

Milodon

30700

Milodon

30701

Milodon

30702

Milodon

31060

Chevy II

Milodon

31501

Milodon

31502

Milodon

31503

Moroso

20180

Moroso

20181

Moroso

20182

Moroso

20211

Chevy II

Moroso

20230

75-79 Monza

Moroso

21804

Moroso

21807

Moroso

21808

Accepted Aftermarket Crankshafts

Manufacturer	Part Number

Eagle

435032505700

Chevy SB 327

Accepted Replacement Blocks

Manufacturer	Part Number

Dart

Little M - 31131111

Use spacer bearings for small journal SBC use.

Dart

SHP31161111

Use spacer bearings for small journal SBC use.

World Products

84010

Use spacer bearings for small journal SBC use.

10051183

Spacers allowed in Stock. Spacers allowed in Stock.

GM Performance Parts

12480047

Dart

Little M - 31138111

GM Performance

12480174

302, 327, 350 Use spacer bearings for small journal SBC use.

World Products

084110

4" bore 4.00 Bore

World Products

084130

4.120" bore 4.120 Bore

World Products

084030

4.120" bore 4.120 Bore

Dart

31161411

4.125

10051183

BowTie Block. Crankshaft spacers permitted.

Any large-journal block

Use spacer bearings for small journal use.

Accepted Replacement Connecting Rods for Stock or S/S

Effective 8/23/2023
Specs: C/C Length- 5.700" Min Weight- 550g Journal Dia- 2.000" Big End Dia- 2.125" Pin Dia- 0.927"

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

Callies

CSA5700CS2A2AH

5.706"

579g

0.927"

SB Chevy Small Journal

Carrillo

BC20-57071

5.700"

629g

0.927"

SUPER STOCK ONLY

Carrillo

C-QD47-65700

5.700"

574g

0.927"

SUPER STOCK ONLY

CAT

CRS-5700S

5.700"

692g

0.927"

SB Chevy Small Journal

Childs & Albert

327-03 LW

5.700"

622g

0.927"

SB Chev Small Journal

Crower

ML93000B3

5.706"

556g

0.927"

SB Chevy Small Journal

Crower

ML93902B3

5.700"

550g

SUPER STOCK ONLY

Crower

SP93200B

5.702"

599g

0.927"

SB Chevy Small Journal

Crower

SSP93300B

5.704"

588g

0.927"

SB Chevy Small Journal

Eagle

CRS-5700S3D

5.700"

655g

0.927"

SB Chev Small Journal

CH5700AZYB-SS8-A

5.700"

557g

SUPER STOCK ONLY

Manley

14105

5.700"

571g

0.927"

SB Chev Small Journal

Manley

14108

5.700"

579g

0.875"

SB Chev Small Journal

Manley

14109

5.700"

568g

0.927"

SB Chev Small Journal

Manley

14340

5.700"

550g

SUPER STOCK ONLY

Manley

14440

5.700"

550g

0.875"

SB Chev Small Journal

Manley

14450

5.700"

597g

0.927"

SB Chev Small Journal

Molnar Technologies

CH5700GAEB-SS8-A

5.700"

560g

SUPER STOCK ONLY

Oliver

C5700 SMSL

5.701"

551g

0.927"

SB Chevy Small Journal

Oliver

C5700 SMUL-3.8

5.700"

568g

0.927"

SB Chevy Small Journal

Oliver

C5700SMLT8

5.700"

632g

0.927"

SB Chevy Small Journal

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

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