Cam bearings

I had someone ask me if I ever did cam bearings before. I answered no. But now I wonder about a thing or 2.

Who has a MoPar specific tool to install S/B cam bearings IF theres such a thing?
Could you do this removal and install while the engine was in car or on a stand still assembled?
Help and hints would be great.

My 318 I just started to disassemble is a 300.000+ mile engine that the 1st owner stopped writing things down on in 1989 or 90. When he gave the car to his daughter for collage and then his son for collage in upstate N.Y. (I live down state on the Island and I am the second owner of the car.) I noticed some cam bearing wear. I would like to change out the bearings with hope of not tearing the whole thing down.
Before I took it out in favor of the 400, it ran excellent without oil leaks or burning.