Mine is a Permacool too but I got it from AA. Uses a generic Ford Screw on filter. My kit was for a GM V8 so it should just screw right onto the engine, since my engine is CPL858 GM van app.
If it's an adapter that is for a GM V8, it's not going to work on the Cummins.
GM V8 (well, smallblock) uses a 13/16" 16 thread filter mount.
Cummins, as previously indicated, uses a 1" 16 thread.
I confirmed this by checking the specs of the appropriate filters: NAPA 1061 for GM small block V8, 1602 for horizontal mount Cummins, and 1607 for vertical mount Cummins. Primary difference between a 1602 and 1607 is that the 1607 is nearly 2 inches longer and slightly larger diameter.
Oh, and before you use "whatever" filter that comes with a remote location kit (I would peg that "generic Ford filter" as a NAPA 1515 - common as beans on Ford gassers, or was..), you might look at the flow rate specs of that filter (
http://www.napaonline.com/Search/Detail.aspx?R=FIL1515_0217939555 for a 1515) and compare to what should be on there (
http://www.napaonline.com/Search/Detail.aspx?R=FIL1602_0006473344 1602).
Ford filter, 7-9 GPM, Cummins 12-16. That's a significant difference, folks. Oh, and add in the effects of a few feet of hose, fittings, etc. on flow, and it gets cut even more. What does it mean? It means that you're going to have the potential of operating the engine with the filter being bypassed a lot more of the time (if not almost ALL the time).