I believe the rockers arms have different numbers. Here is a post that Identifies which rockers go on which years. Rocker Arm ID

Last edited by Phak1; 10/07/2023 12:06 AM.

Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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