I am using a spin-on filter on our 235. It is a remote by-pass filter and mount from NAPA. The filter is a NAPA 1320 and has the restrictor hole built in.

Built an adapter mount plate to fit the mounting bosses on the Offy intake to the oil filter mount and bolted it on. Plummed it with steel tubing instead of rubber hoses.

Found a nice chrome filter cover to dress it up a bit at Summit.

Works great and looks good!

47 Fleetmaster, Hotrod 6, 5 Speed
50 Sedan Delivery, 327, 5 Speed