So I converted my idiot lights to gauges today, and for the life of me can't seem to find the original oil pressure switch which I was going to take out and replace with my new oil sending unit for the gauges. Am I missing something or just blind??? I have looked all around the distributor, and on idiot light cars there is no sending unit above the oil filter. The only thing I found was on the passengers side of the block behind the starter, doesn't look like the oil pressure switch, it has a dark blue wire going to it. The 305 is stock with the ECM and all. Any help would be greatly appreciated, I have searched and searched and can't find an answer.