Hey Guys, I have been working on my friends 67 Coronet that he put a 360 in. We bought a used 26" radiator at a swap meet for $30 and put it in. The car is getting a little warm and when I feel the front of the radiator some areas are cooler than others. I took it back out and ran a hose in it and the water came out as fast as it was going in. But I did get some junk to come out and there is some scale built up in it. Is there any product or home remedies that would clean it out or should I bring it to get cooked at a radiator shop?

Thanks Scott!