In my admittedly biased opinion, if a stovebolt engine needed full flow filtration, some GM engineer would have figured out how to do it from the factory. They managed to do just that on the later 261's. All a full flow system does is strain out the chunks big enough to damage bearings and score cylinders- - - - -most of the nasty stuff passes right on through until the bypass filter with much finer pores in the filter media can grab it. A best-case scenario would be to have two filters, one full flow for the big chunks, and an ultra-fine strainer for the small stuff. Some spin-on filters intended for hydraulic fluid have 1-micron media- - - -which catches particles 1/10 the size of a full flow motor oil filter. One of those filters with a 1/16" bypass orfice to control the flow rate, plus a second spin-on plumbed as a full flow on an engine with the oil galleries modified would be ideal- - - -but unnecessary.
Jerry
