There is a listing on local Market Place for a Pair of complete Rocker Arm Assemblies. Seller has no Idea what they fit and no ID Number. Arms have casting # EAU. Any Idea what they are? Look like Y-Block shaft Assemblies from Picture.

  

Thanks. So these should be for 55 and later Y Block 272-292? They look new unused in Picture. No Idea how long they have been sitting but the Price is right if they are New. Seller has no clue what they are for. Maybe bargain Time.

  

CASTING ID NO 5751066 (1.43 ratio) was introduced in the 1958 model year (used to 1964) and eventually became the service replacement for all prior years incl the 1.54 ratio arms.

The SERVICE PN was C0AZ 6564-A.

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