@mp, I would also compare the bolt patterns. When I got Hall's stainless tank, as I recall neither my former "stock" sending unit nor the universal sending unit I was converting to fit the Hall tank, I had a friend helping who is highly skilled in welding, fluid mechanics, etc. who got me squared away. Also with the bottom drain which the Hall tank drain did not match what I had researched in advance to be the stock plug size for my year. But my first P-car having been a very early pushbutton, mismatches never surprise me. FWIW.
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