360 magnum flexplate?

Can you list the part number stamped in each of those in the first picture?
The smaller one on the right looks it's for a 904 trans. The larger one on the left looks like it's for a 727.
The B&M part number 10242 is for Magnum balance with 727.
The B&M part number 10236 is the one still available that fits LA 360 balance with 727.