Darin367,

You have a 1962 261 that was converted to full-flow? The 1958-1962 261 USA Chevrolet truck engines came with a full flow oil filtration system. Earlier 261s and all 216/235 engines came with bypass oil filter systems.

Nifty 50,

Here is a discussion of this matter. Here is a picture from a 1960 Shop Manual. There are direction-of-flow-arrows in the picture.

Tim