Harland Sharp SBC 74-91 7/16" Stud Mount Roller Rocker Arms, 1.65 Ratio, for SBC W/ Offset Intake & Canfield 225/226/227 Heads (0.150 Offset)

Harland Sharp SBC 74-91 7/16" Stud Mount Roller Rocker Arms, 1.65 Ratio, for SBC W/ Offset Intake & Canfield 225/226/227 Heads (0.150 Offset) Notes: The pushrod cups have been moved .0150 to the left & right, on the intake rockers, so special guide plates will be needed. In some cases these rockers can cause damage, rather than make horsepower. Pre 1974 heads must install a straight 7/16 or 3/8 rocker stud in place of the factory bottleneck style. 1974 to 1991 must machine head for guide plates and drill & tap for 7/16 or 3/8 rocker studs.
Specs:
Rocker Arm Mounting Style: Stud
Self-Aligning: No
Rocker Arm Ratio: 1.65
Stud Size: 7/16 in.
Rocker Arm Style: Full roller
Rocker Arm Offset (Intake): 0.150 in.
Shims Included: No
Rocker Arm Material: Aluminum
Rocker Arm Body Style: Standard
Rocker Arm Fasteners Included: Yes
Rocker Arm Nut Style: Polylock
Rocker Arm Finish: Orange anodized
Quantity: Sold as a set of 16.
Notes: Must Use Canfield 225, 226, and 227 cylinder heads only. Sets Include:
4 left offset intakes, 4 right offset intakes & 8 standard exhaust. Picture #3 Explanation:
When ordering look at the rockers from the top (flat side up) with the roller towards you, the diagram shows how offsets are determined.