I am working on fitting a Hayden thermostatic sandwich plate in place of the stock oil cooler, although my goal is to fit an external oil cooler (found a thin one I believe I can fit behind stock radiator in the fan shroud where the "flaps" are located), I believe if I can find an adapter that works, a larger oil filter will easily fit.
Problem is I cannot find a fitting that will match engine block threads (do not know thread size, but RAAM posted in another thread its 3/4" and 16 threads/inch) and oil filter threads (supposed to be 3/4 x 16 also). Oil filter measures 16 threads/inch and 3/4" diameter, but something about threads is not working.