Thread size on TBI water pump?

[Slade88]

Anyone know the thread size on this plug in my water pump? I need to get a Vortec coolant bypass in order using this plug hole, I assume I can do that

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[454cid]

I'd guess 1/2" pipe thread, but I dont know that for sure.

 

[Dropped88]

I'd guess 1/2" pipe thread, but I dont know that for sure.

That's correct just been through adding a nipple to one of my pumps