What do these numbers mean?

[BUCKEYE BOB]

I found these numbers on the passenger side of my engine,can anyone
tell me what they mean? C90E-6015-E3AZ & underneith those numbers
are these numbers 8K23 then there is a 79 by the last plug &
a 17 by the starter

 

[5.0Flareside]

the c9 is a casting number.. telling you that engine block is a 1969 casting.

what engine is it? if its 302 or 351W then ya got a good pre 74 with stronger walls cause the higher nickel content and thicker webbing.

 

[BUCKEYE BOB]

Yes it is a 302

 

[kiwi f150]

here is a good link

http://reincarnation-automotive.com/casting-numbers-page-2-ford-casting-numbers-explained.html

 

[BKW]

the c9 is a casting number.. telling you that engine block is a 1969 casting.

But, the C90E block was cast in 1968. 8K23 = October (K) 23, 1968 (8).

Casting numbers are foundry marks only, cannot be cross referenced to Ford part numbers.

302 introduced Spring 1968 for Passenger Cars. Bronco, E100/300, F100: 302 intro'd for the 1969 model year, that began September 1968.