Freeze plugs starting to go...273 V8

I had one leak on my 66 Dart with HP273. I tried the stop leak trick as a temporary fix but the leak came back. I replaced the plug and flushed the heck out of the block when the plug was out. The outside of the plug looked like new but the backside was rusted through. I also took the block drain
out of the other side and dug the sludge out of that side also. I would
reccomend you pull the engine and replace them all. The engines in the
earlier Mopars are pretty easy to pull and the job would be done right. It would be money well spent. Mike