single plane 360 intake wanted

OK, heres 3 shots, front left right sides of the intake. I think this will answer the question at hand. I'm not understanding the
a bolt hole drilled and tapped next to the t-stat housing almost center line of the intake?
part.

However, I'll sell this. If you want it, let me know, I just went outside and double checked the carb holes, there fine. I've owned this since new ('89) and it is dead stock OOTB condition. Painted in the color aluminum right now. Though these pictures do not show it as such.

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