Oil Filters: Mobil 1 M1-203 vs M1-107A(?)

[sgc2c]

Got a 1976 Cadillac Fleetwood; was able to find the Mobil 1 M1-203 previously.
Is the M1-107A its replacement?
Can’t seem to find a straight answer to this.
Thanks.

 

[DuckRyder]

Both O Reilly and Advance come up with M1 206A assuming it is a 500 which is the only engine they show. based on some cross referencing 107A does not appear to work.

I would research some recent changes in oil filters before buying.

 

[sgc2c]

I think that’s the correct direction, DuckRyder.
Dimensionally the 206A looks closer to the old 203.

The M1-203 was perfect for the application: why’d they discontinue it?