Question...what is the normal running temp for a 1972 340

Thanks, I agree ..Ill have to look back at his thread...Everything seems to keeps pointing back to the Radiator, I'm just not understanding how it can cool off so quickly as soon as I slow down, but then I,m not even close to being an expert on anything I'm more of a remove and replace kinda guy. lol
Any thoughts on who or where to buy a new Radiator ......maybe a 3 core ? Its an air conditioned car , it has the 2 core radiator in it now.