Spin on oil filters are a good idea. These type filters catch the smaler partical and can be changed every 50 hours instead of at 25 hrs with the screen filter. This spin on filter housing replaces the current screen housing on your motor now. This screen is found between the two mags. If you have the room, the 90 degree type filter housing makes a very nice instalation, and keeps the mess down at an oil change. You can use the A/C type filters : Champion 48110-1, Tempest, Kely or the old Ford FL-1 found at any auto parts store.
RDH Air Parts
Ft. Myers Fl
239-872-0772