Until you can find the specs on the cam and who made it, if you want to run it try setting the valves around .022" hot. Most of the solid rollers out there run between .018"-.026" of lash. That would put you right about the middle and should be ok to run it. You can then play with the last a bit to see what it likes and where it runs best. Not the easiest way, but if you are unable to determine who made the cam and the specs on it, at least you'll be able to use it.
The 316BR4 number looks like a lobe number from a catalog. A few phone calls might get you the info you need........What about asking who you got it from?