Edelbrock Part # 77781 Red Roller Rocker arms are designed for small block Ford's using 3/8" studs. This 1.6:1 Ratio, single replacement rocker is manufactured in the USA from lightweight 7129 grade aluminum. The body is CNC machined then micro polished and anodized for durability. The trunnion race, roller pin and roller tip are centerless ground for superior quality. A high quality Torrington needle bearing fulcrum combined with a roller tip ensure smooth operation and performance. The full body design will accommodate up to 1.65" diameter springs. Thick-walled adjusting nuts and 4140 steel poly locks are included.
Maximum Spring Outside Diameter 1.65 in
Self Aligning No
Rocker Arm Finish Red Anodized
Rocker Arm Nut Type Poly Lock
Rocker Arm Ratio 1.6
Rocker Arm Type Full Roller Rocker
Slot Width 1.477 in
Stud Thread Diameter 0.375 in
Shims Included No
Mounting Type Stud
Rocker geometry should be checked, making sure that the contact point of the roller remains properly on the valve tip and does not roll off the edge. Visual inspection of the rockers, valve springs, retainers, and pushrods should be made to ensure that none of these components come into improper contact with each other. If problems with valve train geometry occur, changes such as pushrod length may have to be made.