Here is mine. It is a Canton.
http://www.summitracing.com/parts/ctr-80-201/overview/
More expensive than I remember but it is a very nice piece.
I like the sight glass so I can see at a glance if the system is leaking. It is low here - my Champion Radiator core is leaking. Replaced with Griffin.
http://67-72chevytrucks.com/vboard/s...d.php?t=615934
The overflow from the radiator cap goes in the bottom of the tank when hot and sucks back into the radiator when cold. The upper hose is the overflow to the ground (shouldn't ever be needed).
TR