Small update
Just a small update here. So I've chosen to go with the larger filter. Go big or go home... It is directly off Carrier reefer includind 90 degree gracket I think. On ebay housing is sold for duramax 1 micron fuel filter. Today I cut out back inner fender. Made access to remove/install. It's needed to make it fit. Or jamm it in there! Now biggest hurdle will be making/building/fabricating a bracket from adequate strength matal to glue it onto frame. To that bracket the 90 degree will be bolted on. Inner fender will have heavy inner tire rubber like from a tractor ,pocket on velcro. After bracket is glued to frame next will be assembly hoses, check valves and fittings. Alert fellas!!! Stainless steel filters are only good for 35 micron!!!! Spin on filter you can have all the way to 1 micron or 3,5,7,10 and possibly more! I'll go with 5 micron and bumped oil pressure by something like 12-15 psi over stock.