[blucar]

It has been written up in several books/articles that generally speaking the insert bearing LB engine, came out in mid-year '36, however, Ford had an abundance of babbit bearing blocks still in their system so they continued to use them.
I believe that I have read that the babbit bearing engines continued throughout the '36 Ford model run.
As stated in the preceding threads, the sure way to find out what engine you have is to open it up.