Pre Magnum stock roller cam specs?

Trying to find out what the stock cam specs are for a engine I picked up a few years ago.
Its casting says its a 1989 360. The previous owner said it came out of a 90 Ramcharger.

The reason I ask is because I brought the 308 heads to the local machinist.
Mentioned to him I was looking at putting a cam in it so he pulled a spring and checked it over. It won't handle anything over a .420 lift.

So now my curiosity is peaked.
Anyone know the stock cam specs for a roller cammed 360 out of a 1990 Ramcharger?

Thanks guys.