I have always had problems with the pontiac engines overheating. always. everyone tells me to put on aluminum heads to fix the problem.
i have done everything under the sun except that so i am going to try that next. i even had a custom built 4 core radiator built for my bird.
timing waterpumps you name it and ive changed it.
when i win the lotto and can afford the edelbrock heads i'll let you know if they worked for keeping temp down.