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Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#42015 01/07/2003 11:21 PM | Joined: Nov 2001 Posts: 58 Member | | Member Joined: Nov 2001 Posts: 58 | Just looked again and the YA code can signify a 1966 or 1969 366 big block from a L-41 50 truck. The 66 is 222 hp and the 69 is 235 hp. Here is a link to read the codes at the end of the stamped number. So you really need the casting number I think to be sure. http://www.nastyz28.com/spmenu.html | | |
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