Did we ever answer the question in the original post by Paul's53chevy? If one does want to convert to a full flow filter, follow the steps in
this Tech Tip. The hole that is drilled and tapped in steps 2-4 will intercept the main discharge passage from the oil pump before the plug that is installed in step one.
When I started my most recent engine build in 2005 I decided to add the full-flow filter to my 1954 261 engine, and followed the instructions in the link above and in the
Inliners' Tech Tips . The statement that "The next hole you will drill from scratch and may be a little scary for the first timer." is an understatement. I was terrified, so I set up the block on my small milling machine to drill and tap the holes for the 3/8" NPT fittings. Using a tapered reamer after drilling the holes also helps. The installation worked out ok.
Subsequently, after conducting some real research, I have come to the same conclusion as Curt B, Jerry, and others, that a good bypass filter may be a better solution. The lubrication handbooks I located also recommend using both a full flow and a bypass filter for optimum filtering, with a differential pressure measurement across the full-flow flow filter so that you know when it may be in its own bypass mode. I believe that Jerry and others have said that they have seen this used.
Hoyt
