running hot

[woofa.express]

woofa express runs hot. where do I go from here.?


had radiator cleaned including rodding out with both top and bottom tanks removed. ran cleaner through engine until clean and refilled with rust inhibitor.
fitted Snyder radiator shroud and 5 blade plastic fan.
removed splash plates.
when temp exceeds 25C ie 75F it will spill overboard a gallon and half when speed is 40mph.
car has travelled 2000 miles since engine overhaul and I believe I have timed it correctly using the tool that fits on distributor rotor and turning it til it hits number 4 plug lead post. forgot the name of the tool.
where do I go from here?
thankyou all in anticipation of your responses. cheers, gary