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Victor Jr Big-Block Chevy Mechanical Roller Camshaft

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The Edelbrock part # 77459 Big-Block Chevy Victor Jr. 24° 300cc cylinder heads feature an extra thick deck and extra material in the spring pockets for a heavy-duty casting that can be used with high-lift cam and heavy spring combinations. Edelbrock offers the complete 77459 cylinder heads with a spring packages to suit mechanical roller cams and 118cc combustion chambers. The 300cc rectangle ports produce impressive flow and great power on competition big-blocks up to 510 c.i.d. with 4.310" or larger bore. Exhaust port exits are raised .534" to greatly improve exhaust flow and power.

Documents & Installation Notes


Availability Available
Application Universal
GTIN 00085347774593
Availability Note Available to Order
Warranty 12 Months
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Matching stud girdle #7797 must be used with stud mounted rocker arms. Deck thickness: 9/16", rocker stud diameter: 7/16", pushrod diameter: 3/8" (width of slot in guide plate).
CNC Ported No
Combustion Chamber Volume 118.0 cc
Deck Height 10.2 in
Deck Thickness 0.562 in
Exhaust Valve Diameter 1.900 in
Guide Plates Included Yes
Intake Runner Volume 300.0 cc
Intake Valve Diameter 2.250 in
Material Aluminum
Push Rod Diameter 0.375 in
Rocker Stud Diameter 0.437 in
Valve Angle 24 deg
Valve Spring Diameter 1.635 in
Valve Spring Maximum Lift 0.880 in
Valve Stem Diameter 0.341 in