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Author Topic: 289 Rocker Arm Numbers  (Read 712 times)

Offline tmahle

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289 Rocker Arm Numbers
« on: November 14, 2019, 02:23:20 PM »
Ok newbie here.  Easy on me guys for this might be a dumb question.  What do the rocker arm numbers represent on a 289.  I notice a "F" and below two random numbers stamped on each rocker arm.  Year, early 1968.
Just curious.
Thanks
« Last Edit: November 14, 2019, 03:58:45 PM by J_Speegle »
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Offline RoyceP

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Re: 289 Rocker Arm Numbers
« Reply #1 on: November 15, 2019, 10:26:36 AM »
Those are typical stock Ford cast iron rail rockers. The letter and numbers represent the mold used to cast that particular rocker. If bad ones started to come down the line anyone could easily tell what mold it came from so that quality control could identify the problem and take appropriate action.
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1968 W code 427 Cougar XR-7 GTE Feb 23 Dearborn C6 / 3.50 open
1968 R code 428CJ Cougar XR-7 May 13 Dearborn C6 / 3.91 T - Lock
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