Hot 318

New to the site, not sure if I am doing this right however, I am running my original 318 engine with a edlebrock 4 bbl and carb. Set up is by the numbers however I have severe heat issues. Rad is original 18" 2 core for 2 bbl intake.
Engine gets so hot the fuel perculates and the engine stalls. Runs fine after cools down. Rad does have shroud and 5 blade flex fan.

Any ideas on cooling this machine down and avoiding the embarrasing stalling would be welcom.