Great find George and it probably will work ..but its not the correct fitting. I checked the plug removed from my tank and its a 22mm Tapered thread in the bottom. The fitting on Pegasus it a straight thread and may work with the o ring as a gasket .. but be sure to file the bottom smooth so the o ring seats.
A 3/4 NPT tap works .. 3/4 is ID 1 1/16 " OD and theres enough meat to tap it.
I would nt use those banjo fittings .. your flowing liquid and all those sharp turns and small holes are restricive. Your defeating the purpose.
This is why the fitting George found is the next best thing to tapping it out you can use a Radius'd 90 with a smooth bend to flow fuel.
My 2 cents.
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