1972 dodge dart with oil light flicking

I vote for checking the wire grounding on something first. Disconnect it from the sender and wrap the end with electrical tape, but also to the sender so it sits in the same place. See if the light flickers while you drive, or even with the engine off, wiggle the wire everywhere and have a helper see if the dash light flickers.

My 69 Dart w/ 225 had the oil light come on during a trip in 1981. After a few minutes waiting, it was OK. It happened 6 months later and I assumed it needed a new oil pump. I was a clueless 22 yr old then. I tried to remove the oil pan and couldn't because of the steering linkage and didn't know about a Pitmann arm puller. I didn't even notice the oil pump bolted to the side of the block (no manual). I let the car sit for 3 yrs while I built a garage, then pulled the engine and had it rebuilt. I think it was actually just gunk against the screen since I had done the "can of engine flush" thing a month before. Perhaps if you drain the oil, then fill the pan with 1 gal of gasoline or kerosine, and let it sit a week, it will dissolve the gunk and it will flow out the drain. Leave a lamp under the pan to keep it warm. But don't run the engine like I did. I now know those engine flushes are bad (don't think they even sell them anymore).