Oil Pump vs Engine Wear question ??

Hey All,

When I am idling at a red light with a warm/hot engine, my oil pressure dummy light blinks on and off. I have had other mopars do this and haven't really worried about it too much. Engine is a 273 SB with 135K on the clock.

I will likely be pulling the engine and resealing it (trans is already out, I am doing a 4sp swap) with a gasket kit as I have some atrocious oil leaks down the back side of the engine. But the engine will be temporary as over the next year or two I will build a 5.9 EFI engine for the car.

The question is this. Is the flickering oil light more likely a worn pump, a worn engine or (most likely I believe) a combo of both? While I have the oil pan off would it make sense to spend the $60 on a new oil pump, that will probably only be used for a year or two? Or will this this oil light keep flickering b/c there is so much clearance between rotating parts?

Thanks for your thoughts,

CE