Are the two screws on the side of the block missing?
I just want you to make sure that the baffle is actually missing.Those 2 screws thread into the baffle, so if they are still there then it is very likely the baffle is still there.
Yes, you will need to remove the oil pan to install the baffle.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission