Hot Rods 8Ba and 1BA

So what was the difference? Why cast the same block with different codes. The 8BA was like 1949-1953 while the 0Ba, 1ba, 2BA were being made?

 

Why start a new thread? The first one had the proper answers; didn't you like them?

 

This question wasn’t asked or answered.

 

The block casting remains the same, the features change, valves, heads, cams, ect.
Hence the I.D. change.

 

Thanks very much. I appreciate it!