Hello fellows, hope everybody's doing well. My first post. I have a 1988 C4. Had her going on four years. Have basically been rebuilding as she was a setter. Problem: Radiator was giving "low coolant" reading. Would not hold an AC charge. Coolant was brown. Had a flush & fill done. Now before this car running great. No problems. None that had not been addressed. Charged AC blowing cold. Get on highway short distance four miles max. AC stop blowing cold . I cut off AC. Get too distantion streaming . I raise hood see some coolant spray on top of radiator no leaks underneath. Overflow revs full . Let her cool down. starts up . Go back too party. Five -six hours later check for leaks on ground see none. She starts up get low coolant light. Head home. Don't make it. Overheats reads 299 degrees hoping then heads not warped. Got it checked four days later. Radiator failed. Was told because rust was holding seams together flushing and added pressure from AC caused radiator too fail! After radiator replacement blowing white smoke from exhaust. Been told head left side (can see anti-freeze ) is warped. Not anyway too know without removing head if its just gasket? Need advice and what's good price for head replacement. Medical retirement low funds. Disabled but can work slowly. Thank in advance. Have been reading you guys advice for two three years think you guys a great with the help you offer.