Trying to decipher exactly what engine my truck came with, I know (think?) it's from something in the mid seventies. Anyone good at interpreting the casting numbers? See photos and let me know what I've got. It's an L6.

Thanks.

http://s843.photobucket.com/albums/zz356/blatham489/Chevy%20L6%20Block%20Casting%20Nos/

Last edited by The Green Farmer; 08/31/2010 7:12 PM.

'69 1/2T stepside, Sea Foam Green, 250 L6 w/ 3 on the tree, not an option on it, in the family since new.