Oil pressure is now fine on my 300 Hurst! First of all, I want to thank the numerous 300 Club members that responded to my problem. The suggestions were all excellent and helped me a great deal to get this resolved. I have been a Club member for only a couple of years; had never sent an e-mail to the group. This 1st time I had a question, the response was immediate and I sure feel good to belong to such a helpful group of individuals! I did not previously realize what an asset this group is if you have a problem-it is getting cold in Ohio and I had to get the car going and back to storage for winter. I removed the Motorcraft new oil filter I had installed when I changed the oil. It was basically empty even though I had run the engine briefly several times following the oil change. I took a new Fram oil filter and filled it with oil ( Club member suggestion ), then started the engine. Within a very short period of time, the oil pressure light went out - what a relief ! I then installed a mechanical oil pressure gauge ( Club member suggestion). I started the engine and the gauge registers good oil pressure. There was a metal pipe plug at the top rear of the engine, right near the oil pressure sending unit for the oil pressure light, so I could use this port for the brass fittings to supply the pressure gauge ( did not have to install a T to supply both the sending unit and gauge.) The new Motorcraft filter I had bought at a garage sale - it was old and may have been bad? In the future, I will always fill the oil filter with oil before installation - very simple, makes great sense, but something I never though of before. I will also drain and refill the oil quickly when changing oil - not let everything drain down for a long period before refilling. Now that I have a pressure gauge, I will keep an eye on the pressure, and replace the oil pump if any problems - in the spring when it is warmer here in Columbus, Ohio! Snow will be here soon and it is getting too cold to crawl under the Chrysler! Thanks a million for everyone's help, support and suggestions! Steve in Columbus, Ohio.