Why would you do this to a pan?

67Dart273 said
??Might of been is some industrial equipment with poor access? EG some of the sno cats used Mopar 318's I don' t know what else.

some industrial fork lifts and generators used not only 318s but the slant 6 all the way up until the mid 2000s. There were in boats in the 90s using the slant 6.