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**Wrenchbender Ret** · 01-15-2023, 07:07 PM

The one behind the dist. is 1/8" pipe thread. The one by the oil filter on a big block is 1/4 pipe thread. I am not shure about that one on the small block. If you buy 1 of each you will have it covered.

George

01-15-2023, 07:07 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,190	Re: Oil Pressure Sending Plug The one behind the dist. is 1/8" pipe thread. The one by the oil filter on a big block is 1/4 pipe thread. I am not shure about that one on the small block. If you buy 1 of each you will have it covered. George