MN Stamped Block with a 2 bolt main?????
 

I been provided some info on a late build COPO car - <span style="text-decoration: underline">supposely</span> the block has a Jan 69 cast date on a 512 block, stamped T1020MN and the vin on the side - however its a 2 bold main block. Build date is 10E of 69.

This does not sound right to me from the basic dates, however, has anyone seen an orig MN stamped block with a 2 bolt main?