Part Identification and Parts Website

Its a 69 273 v8. Thanks for the pointers. I found the part on the auto zone website so I'll be picking it up tomorrow. In preparation I drained all of the power steering fluid. I drove the dart around the block a few times to see how hard it would be without power steering. As I was driving the oil light came on. Does the oil light monitor power steering as well or is there actually an issue with my oil? I know my oil level is a bit low. Going to top it off tomorrow. But, does the oil light monitor power steering as well?
Oil light monitors engine oil pressure only. When it comes on, there are any number of potential reasons, could be down 2 quarts of oil or more, the oil could be extremely thin, the sending unit could be bad, the pickup tube in the oil pan could be too close to the pan, or too high, or the pump could be worn out, lastly the bearings could be worn out. Or any combination of the above. Assuming the engine is original and not recently rebuilt, I would expect that the bearings are worn. First step should be to connect a mechanical gauge and get a reading with fresh oil and filter, using a good quality oil, 10w30 minimum grade.