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1966-67 Z bars clutch rods, OEM & Repop / 1964-72 Hydraulic vs Mechanical Clutches & 1964-72 Hydraulic Under DashSystem, T56 Install- Parts Swap, TKX

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#1 · (Edited)
1967 Chevelle 2nd Design Mid Year Z Bar Design with Curved Upper Arm
1967 Chevelle 2nd Design Mid Year Z Bar Design with Curved Upper Arm


In 1967 there were two versions of both BBC & SB Z bars. There was a mid-year change on both due to the Offset Steering Column Bracket Design that was needed for the New Collapsible Column Design for 1967. The 1966 and very early 1967 Z bars had a Straight Upper Arm, while the later ones (2nd Design GM 3921040) had a Curved Upper arm. This meant there could have been a Mid Year change for the upper push rods which I can not confirm. This was true for the Small Blocks and the Big Blocks. See the attached Photos of the photos of the late 1967 Z Bars


The 1967 Z Bar 2nd Design (GM 3921040) has the Upper Curved Arm that’s has the same bend (dog leg) as a 1968 Chevelle Z Bar / Bellcrank. which makes the Clutch Linkage Geometry Align Better. (the only difference between the early 1967 and the late 1967 is the upper arm which has a Bend (dog leg) which aligns Better with the Pedal Rod and Eliminates some of the Side Loading on the Bellcrank due to the Offset Steering Column Bracket Design that was needed for the New Collapsible Column Design for 1967.
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