Casey from SWISCO responded:
July 10, 2023
Hello, I see that you were looking at the S350-28 channel balance, which I agree looks like a match to your assembly. You would also need a 2740 strength option based on your 27 4 stamp code. Please note that the bottom fitting measures 1-3/32" as shown below. Thank you! Close up view of the S350 balance shoe.
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