just use the cover to pattern one out of gasket material
conversions are easy to do
some use a bypass cover of more modern engines which have a place to mount a OMC square pump
another method which works fine is this video (plug one channel)
https://www.youtube.com/watch?v=FtG4M7ye1N8 with this method I mounted the B&S pump on a triangular bracket bolted to the rear bracket
some will just put a small plate OVER the top (center drilled)_ bypass to mount a “lightly off-set” square pump.. it works fine also but don’t forget to block the air pressure nipple behind the carb. use a short piece1.5” of fuel hose with a big screw in in it. or small bolt secure with tyewraps.
and some would never modify a pressure system which are fine unless the tank leaks or looses pressure.
up to you
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