I’ve replaced thermostats, rad caps, the heads, the head gaskets, radiator, etc and I kept getting air in the coolant, along with random spurts of 250 degree coolant temp (Steam I assume) on the aftermarket temp sensor (OEM read all good saying within the safe range), and a constant clicking and popping of all the thermostats I’ve tried combined with a upper rad hose gurgling and shaking like crazy. It usually last about 30 seconds then It’s all normal again until the cycle repeats later in the drive, sometimes overflowing the coolant reserve bottle. I just kinda figured after all that all that’s really left is the .060 over block. I would love to be wrong and finally fix that head scratcher of a problem. I’m open to any suggestions haha