I have just got the car running over the last couple weeks so there isn't a lot of time with the car.

The oil pressure was fine until about a day or 2.
The oil pressure is below 10 at idle and 35-40 at 4000 rpm.
(oil pressure guage is comp electrical guage)

Never had any experience chasingthis kind of problem and would love some advice

It has an external oil single line, deep pan.

The engine is a Mopar 500 inch crate engine I bought used. The engine is about 5-6 years old, Eddy heads Small hydralic roller cam.

I was thinking of just pulling the pan and seeing if there is any crap at the pickup? (easy to do with the modified oil k-frame)

(oil changed recently, had some dye in it to find some oil leaks)

What should I look for in the oil pump when I remove that?

Anything I should check. It is noisy for a hydralic cam.