egr or timing backfire

[Casca 2525]

So 10 days and 25 posts and not one single picture provided. THAT'S the rabbit hole. I'm done here.

 

[Casca 2525]

I do have question, it has EGR but no air pump, it has two sheaves on the crank pulley, one on the water pump then on to the alternator, the power steering doesn't go around the water pump, there are no mounting brackets and the block doesn't seem to have the correct holes for mounting and air pump and if did mount it have to use the power steering drive belt

 

[Casca 2525]

and here is the final batch