Father-Son 1974 Duster Project

What gaskets are going to be good to use? Only loosened the passenger valve cover to get intake off. Should I get new valve cover gaskets too?

While intake is off I'll redo the oil pressure T I wasn't crazy about. Anyone know where I can get an OEM style connector for the stock oil pressure sender? I used a female spade connector but it does not stay tight. Also need to find the OEM style boot connector for factory temp sensor. I have been using an alligator clip until
I locate one.