Sep 7th update:
Got a new three row aluminum radiator installed and new overflow tank. Also now have an electric cooling fan. Picked up a new engine as well from camaro2you, thanks again. 1970 block with number 11 heads. More power than my 73. I plan on getting the car running with the 73 engine first and haven't decided what I want to do with the side engine as of yet.
Also got he fenders and inner fenders on and cleaned up. New coat of semi gloss and undercoat.