Senior Tech Team
Join Date: Dec 2006
Location: portland oregon
Re: 69 chevelle L78 HEADS 3919840 MARKING
Again, I've got a '69 L78 Chevelle that hasn't been on the road since '74. All numbers matching, original bore block, and the water pump is dated 4/69, the heads C28/C29 and the trim tag is 7B. That's all I can remember, but will look for the block date when I get a chance. It's one thing to gather dated parts and adhere to accepted dates, but don't ever be discouraged when you find parts that you presume to be original to the car and they preceed what others seem to accept. Most of the opinions on dates are based on what is read, not what has been witnessed.