The 2141 is a casting #, what's the Carter # on the back left corner of the base? It will be 4 digits ending with an "S"? I have a 4973-s but that one looks different, was it on a manual or auto?
(Similar to the pic below)
Should be:
4872 or 4972 C-4-TQ 71 340 M/T
4973 C-4-TQ 71 340 A/T