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The Mark IV big block was the culmination of Chevrolet's performance engine development. Introduced in 1966 as a production engine option for full-sized Chevrolets, the highly versatile 427 cubic inch big block terrorized local drag strips and gave high performance engines a new standard. The success was short lived due to fuel shortages and emission standards. But fear not! The horsepower happy big block lives on and Speedway Motors is your source for performance parts and accessories for your 427 Chevy engine.

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396, 402, 427, 454, 496, 502, 9.25" Overall Length

Overall Length: 9.25"

Overall Diameter: .63"

Material Type: Steel

Finish: Black Oxide

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Chevy Small Block V8, Chevy Big Block V8, Steel, Black

Outside Diameter: .31"

Compressed Length: 7.38"

Extended Length: 8.75"

Material Type: Steel

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396, 402, 427, 454, 1.67" Stud Length, Steel, Black

On Sale

Stud Length: 1.67"

Thread Pitch: 3/8"-16

Thread Length: 0.53"

Thread Pitch (2): 3/8"-24

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396, 402, 427, 454, 496, 6.773" Overall Length, Steel

Overall Length: 6.773"

Overall Diameter: .48"

Material Type: Steel

Finish: Black Oxide

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396, 402, 427, 454, 502, 1.55" Under Head Length, Steel

Under Head Length: 1.55"

Thread Pitch: 1/2"-20

Wrench Type: 12 Point

Material Type: Steel

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396, 402, 427, 454, Roller Rocker Arm Style, Steel

Ships Free
On Sale

Rocker Arm Style: Roller

Rock Arm Ratio: 1.7

Stud Diameter: .44"

Material Type: Steel

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396, 402, 427, 454, 496, 502, 572, .75" Thread Length

On Sale

Thread Pitch: 7/16"-20

Thread Length: .75"

Thread Pitch (2): 7/16"-14

Thread Length (2): 1.00"

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396, 402, 427, 454, 496, Hex Wrench Type, Steel, Black

Ships Free

Wrench Type: Hex

Material Type: Steel

Finish: Black Oxide

Color: Black

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$56.95
$71.19

396, 402, 427, 454, 496, 572, .69" Inside Diameter

On Sale

Valve Spring Style: Standard

Valve Spring Retainer Style: Standard

Inside Diameter: .69"

Outside Diameter: 1.50"

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$44.95
$56.19

396, 402, 427, 454, Steel, Black Oxide, Black

On Sale

Material Type: Steel

Finish: Black Oxide

Guideplate Pushrod Size: 0.437"

Guide Plate Style: Raised

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$44.95
$56.19

396, 402, 427, 454, Steel, Black Oxide, Black

On Sale

Material Type: Steel

Finish: Black Oxide

Guideplate Pushrod Size: 0.375"

Guide Plate Style: Raised

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$456.95
$571.19

396, 402, 427, 454, Full Roller Rocker Arm Style, Black

Ships Free
On Sale

Rocker Arm Style: Full Roller

Rocker Arm Ratio: 1.7

Stud Size: 0.437"

Rocker Arm Nut Style: Polylock

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$57.95
$72.44

396, 402, 427, 454, Steel, Black Oxide, Black

On Sale

Material Type: Steel

Finish: Black Oxide

Guideplate Pushrod Size: 0.375"

Guide Plate Style: Raised

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396, 402, 427, 454, Chromoly, 7/16"-14 Thread Pitch

Material Type: Chromoly

Thread Pitch: 7/16"-14

Finish: Black Oxide

Wrench Size: 1/2"

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396, 402, 427, 454, 496, 1.9" Overall Length

On Sale

Overall Length: 1.9"

Thread Length: 0.75"

Thread Length (2): 0.75"

Finish: Black Oxide

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$228.95
$286.19

396, 402, 427, 454, Full Roller Rocker Arm Style, Black

Ships Free
On Sale

Rocker Arm Style: Full Roller

Rocker Arm Ratio: 1.73

Stud Size: 0.437"

Rocker Arm Nut Style: Polylock

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$187.95
$234.94

396, 402, 427, 454, Full Roller Rocker Arm Style, Black

Ships Free
On Sale

Rocker Arm Style: Full Roller

Rocker Arm Ratio: 1.7

Stud Size: 0.437"

Rocker Arm Nut Style: Polylock

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396, 402, 427, 454, Hex Wrench Type, Chromoly, Black

Ships Free

Wrench Type: Hex

Fastener Style: Bolt

Material Type: Chromoly

Cut to Fit: No

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$14.95
$18.69

396, 402, 427, 454, 496, .95" Overall Length, Steel

On Sale

Overall Length: .95"

Overall Diameter: .88"

Under Head Length: .71"

Diameter: .70"

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396, 402, 427, 454, Chromoly, 7/16"-14 Thread Pitch

Ships Free

Material Type: Chromoly

Thread Pitch: 7/16"-14

Finish: Black Oxide

Wrench Size: 1/2"

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396, 402, 427, 454, Gold Zinc Finish

Finish: Gold Zinc Finish

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396, 402, 427, 454, 496, 572, Steel, Black Oxide, Black

Material Type: Steel

Finish: Black Oxide

Guideplate Pushrod Size: 3/8 in."

Guide Plate Style: Raised

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$35.95
$44.94

396, 402, 427, 454, Full Roller Rocker Arm Style, Black

On Sale

Rocker Arm Style: Full Roller

Rocker Arm Ratio: 1.7

Stud Size: 0.437"

Rocker Arm Nut Style: Polylock

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$509.95
$637.44

396, 402, 427, 454, Full Roller Rocker Arm Style, Black

Ships Free
On Sale

Rocker Arm Style: Full Roller

Rocker Arm Ratio: 1.6

Stud Size: 0.437"

Rocker Arm Nut Style: Polylock

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$11.95
$14.94

396, 402, 427, 454, Steel, Black Oxide, Black

On Sale

Material Type: Steel

Finish: Black Oxide

Guideplate Pushrod Size: 0.375"

Guide Plate Style: Raised

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$127.99
$224.36

396, 402, 427, 454, 12 Point Wrench Type, Chromoly

Ships Free
On Sale

Wrench Type: 12 Point

Fastener Style: Bolt

Material Type: Chromoly

Finish: Black Oxide

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$8.95
$11.19

396, 402, 427, 454, Steel, Black Oxide, Black

On Sale

Material Type: Steel

Finish: Black Oxide

Guideplate Pushrod Size: 0.437"

Guide Plate Style: Raised

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Chevy Small Block V8, Chevy Big Block V8, Chromoly

On Sale

Bolt Length: 4.25"

Under Head Length: 3.75"

Wrench Type: Hex

Material Type: Chromoly

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Chevy Small Block V8, Chevy Big Block V8, Steel, Black

On Sale

Material Type: Steel

Finish: Black Oxide

Overall Diameter: .50"

Overall Length: 5.75"

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Many Engines, 1.00" Under Head Length, Chromoly, Black

On Sale

Under Head Length: 1.00"

Thread Pitch: 7/16"-20

Wrench Type: 12 Point

Material Type: Chromoly

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