[JSeery]

Only thing I would add V8 that as far as I know the Canadian blocks were not originally threaded in the horizonal passageway and this type of screw was not used. The block would have to have been modified somewhere along the way for this to occur. And, that could well have happen, so it needs to be checked. The original factory setup used a fitting that screwed down into the vertical passageway and blocked the horizontal one. The original system had a safety relief valve to by-pass the filter if it became plugged for some reason.