That fitting in your old engine is an NPT (national pipe thread) and is tapered in shape. It's a 3/8NPT, I believe. I'll have to look at my taps when I get home to be for sure on what size it is.
That fitting in your old engine is an NPT (national pipe thread) and is tapered in shape. It's a 3/8NPT, I believe. I'll have to look at my taps when I get home to be for sure on what size it is.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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