1989 Cummins 855 Help

I had a big cam 350 come into my shop, off of a sawmill for a rebuild.Here is the problem, it has step timing that I would like to do away with. I have a good set of heads and rocker boxes and injectors for the non step timing set up. Does anyone know what cam that I can change to do away with the step timing? I have tried all the salvage yards in my area and no one has the parts I need. Any help on identifying the cam or the location of one ,new or used would be appreciated.
Thanks.

breezyridgerepair@gmail.com

1989 Cummins 855 Help