Spin on filter conversion is quite easy, with parts readily available. There are several threads on this forum that will help you make the conversion. Just search "spin on filter" Good luck!
1949 Dodge B1-D......or What have i gotten myself into?????
MBFowler replied to Darkrider's topic in Mopar Flathead Truck Forum
...GRAVELY L model tractors used to use a bracket to replace the sealed canister typefilter to allow you to use aspin -on type. That can be remotely plumbed and either mounted in the same location as the canister you have. If it's mounted to the head like the original, you can use fixed tubing, but...