I was able to mount the filter on the front part of the manifold after sawing off the cast part where horns were mounted on some vehicles. I made hoses to and from the block to the filter. I found conflicting info when checking to see which was the inlet and outlet on my engine. Some sites said that the front port was the outlet on 261s but others said that the rear was the outlet on 235s. I know 235s were partial flow filters and 261s like mine are full flow setups. Is it reversed between partial and full flow oilers? I turned my oil pump and found that oil, a lot of oil actually, came out the front hole on mine so I connected that to the "IN" port on my filter. Curious about the difference in info though.
