Safe max RPM for bone stock 5.9 magnum

I’ve had horrible engine luck the last few years. I’m trying to change as little as possible and just keep it together until the snow flies. Sounds like I need to find a 5200 rev chip.
I am very impressed so far with this bone stock magnum. I’ll probably swap in the 3.23’s shortly but the 3.91’s are a blast :usflag:
Must be an older 6AL setup, haven't seen a chip setup in some time. The box I have on my old Ford has a set of dials.