1st, is it brand new re build? it would run hotter at frst...

2nd, do you have all the fillers? like lower air baffle, the "masticated" or rubber fillers on ea side of bottom of radiator? and the most obvious , the X fillers...

also , how "hot" is too hot? You dont mention any temperature?
also whats the outside temp ...?
also, if running "lean" it runs hotter , you might richen it up some...
is your fan working right?
1/2 in , 1/2 out of shroud?
at 30 mph fan makes no difference ,so is it hot at idle or running at speed?

Here we have 88-92F now , my car runs at 195-200, goes up to 205 after a long run at 200 , when you stop at a redlight...maybe as high as 210....in July /August , when its 95-98F here its usually running at 210-215.....which is not too hot