Well I finally got my engine fired up and ran it at a little over 1500 rpm for the recomended 1/2 hour and it ran fine. During that time I had the pet cock open and a water hose on to maintain cool water for the engine during the run in. I also set the timing and checked the trans. All went well. After the run in I set trhe idle to about 800 rpm and even though I didn't drive it yet I parked the car outside. I started and shut it down a couple of more times and it seemed all was well. Anyway As I stood there with it running I was just taking a couple of minutes to admire my work when suddenly I started to hear a slight ticking noise and the oil light went on. Now, The car has no guage just a light so I could not see the actual oil pressure but the pnmp is like everything in the engine, Brand new. I had also replaced the pump shaft. I have a oil pressure tester at work that I will bring home on Monday But I am wondering what could be going on here. Has anyone here had this occur and what could be the problem other than the pump? I am confident that I had performed the run in properly , Or Have I? Any opinions?