Slant Six Oil light coming on — need a new pump?

Thanks for the reply. I'm wondering if there is anything I can do without having to pull the engine. The nipple that the filter spins onto has a hex head, can this be replaced? Then maybe run some kind of cleaner through the oil system, replace with a heavier weight of oil and I'm good to go? Sorry to sound a bit ham-handed but I'm wondering if I can get away without making this a big to-do, especially if I plan to do a small block swap in the future.