Hillbilly Trucking

How can I tell if it's a American Bosch pump or Robert pump 

1984 Mack 6cylinder Mack motor,Emissions Control ID plate says it is ENDTB676 283HP. The Injector pump is 313GC5173P10.

Engine casting # 239GB5358C....

When you pull up the numbers on it, says 673,when you contact Mack Garages they can not find any information on this 1979 engine with after coolers. 

What I am try to find out about this motor,is what type is it? Is it a Maxidine, Thermodine? How many HP? And most of all, what injectors go in it? Mack says, 736GB337P5 which are now obsolete....What injectors go in it, and which ones can I put in it? Where is the Engine ID plate?

Maxidine engines have 2 oil filters, mine has three....what is the difference?