The Edelbrock part # 77485 Big-Block Chevy Victor Jr. 24° 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 equips the complete 774815 cylinder heads with a spring packages to suit hydraulic roller cams. 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.
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 106.0 cc
Deck Height 9.8 in
Deck Thickness 0.562 in
Exhaust Valve Diameter 1.900 in
Guide Plates Included Yes
Intake Runner Volume 300.0 cc
Push Rod Diameter 0.375 in
Rocker Stud Diameter 0.437 in
Valve Angle 24 deg
Valve Spring Diameter 1.550 in
Valve Spring Maximum Lift 0.700 in
Valve Stem Diameter 0.341 in