An oil filter on a 216 is a waste of money. The place the supply hose and the return hose attach both have oil pressure at them. This means there is very little flows through the filter except maybe at an idle.
??? On all the 235's and 261's I have the bypass return is simply a hole thru the side of the block to dump it back in the pan without any pressure involved. Once when changing oil I forgot to tighten the canister lid any more than hand tight and fired it up. At the rate the puddle on the floor grew I knew mine was moving plenty of oil at idle.
