Picked up the matching engine for my 70 OG trans I had bought in the fall.
turns out this combo came out of another 442 from the same factory and was built just 1326 vins ahead of mine.

mine is a 03D built car, 23. Mar to be exact. So this had to be a last Feb or early Mar built car also
block build date: 54 also a 4 cast if anyone cares and F1
intake build date: 49
heads date: 22 and 354 ( has to be one of the last heads built in Dec of 69 )
water neck date: 344
some pics of the eco motor