No, there are none of the notches in the block, caps or bearings. See the pics. Also see the pics of the stamp pad. As noted in a earlier post the casting is H55 which I believe is August of 55. Quite late for a '55 block. The serial number is quite high as well indicating late. I'm guess ing this is a block caught up in the transition from one bearing design to another.
Attachments
Bearing in block.jpg (269.07 KB, 135 downloads)
Bearings in caps.jpg (268.77 KB, 132 downloads)
VIN stamp.jpg (223.88 KB, 126 downloads)

1954 3600 Stakebed
non-original engine out of a '55 passenger car with powerglide