Help with fan switch SBC

[jcal87]

I believe my fan switch is out because my fans are not kicking on when the engine is hot and I am having to manually turn them on. I took a piece of wire and touched it to the switch and the block to ground it and they kick on. I purchased a new fan switch from Summit, but I am having a hell of a time getting a socket or wrench on the 11/16 connection.

Is there a trick I am unaware of to get this thing out without having to take the headers off? Pics below.






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