date codes on exhaust manifold

[Marzio Cano]

I'm in search of correct 2" rams horn manifolds for a 66 built in Nov 65. I found some on ebay that have the correct casting numbers 042 and 559, but I'm unsure about the date codes. Seller states they are dated I 9 (Sept 9th) and
J 15 (Oct 15th), but the Right Hand manifold pic shows RH 18. Are there date codes on the back of manifolds as well that disclose year made? Any help on how dated manifolds should be read?

[Terry M.]

Re: date codes on exhaust manifold

Mazio,
Small block cast iron exhaust manifolds in the C2 & C3 era did not have a year of manufacture in the date code.

[Terry M.]

Re: date codes on exhaust manifold

Mazio,
Small block cast iron exhaust manifolds in the C2 & C3 era did not have a year of manufacture in the date code.