Fill in the damned blanks man. We aren't mind readers here. You asked for help, yet are still expecting US to know what YOU have.
"Stock radiator." Which one? Slant six? V8? How many rows? how wide is the core? 22"?
"318." Stock? Warmed over? Radical as all hell?
"Stock fan." Which one? Fixed blade? Clutch fan? How many blades?
Fan shroud? Yes. No.
Air conditioning equipped?
Transmission type? Automatic? Manual?
Pulling answers shouldn't be like pulling teeth. We cannot help you if all you give are a bunch of generalities.
In order to have a GOOD cooling system,you must have a COMPLETE cooling system using ADEQUATE parts.
A good flowing 2 row radiator for a stock or mild 318 is absolute minimum. 3 row for air conditioning. A fan shroud with a good functioning fixed blade or clutch fan in the right position (blades about halfway into the shroud) is correct.
Initial timing that's too far retarded can contribute to overheating. Also a carburetor that's too lean. There are many variables here, so quit playin around and give us some information. If you don't know some of it, find out and come back. We'll still be here.
I am not sayin all this to be an ***. We have so many threads like "my car is blue, what's wrong with it?" that it gets old as hell. Please help us so we can help you.
