Review on Sierra International Oil Pressure Sender (OP72533) - Enhanced SEO-friendly Product Name by Ronggolawe Denney

I ordered this part thinking I could mount it to the block with an adapter but could only find a 2" steel extension or a 1/2" brass extension. For marine applications I didn't want to use brass to avoid corrosion of dissimilar metals. The steel extension tube available in speed shops was too long to fit. So if you're a GM deal, skip it and buy an A68301 crankcase if you want to shut off at 2-4 pounds of oil pressure, or a Mr gasket if you want to shut off fuel at 15 pounds of oil pressure. both are 1/8 NPT and cost about $18. The MR Pad is sold with Prime on Amazon, and the Carter is half price on Amazon. this is a good part with almost exact specifications for Carter, just the wrong thread for GM applications.