Ahh Zinc's!!!
Reminds me of my days on the Sub bilge divin' and replacing those 22 lb SOB's they had bolted all over the hull!
used them for weightlifting too. And the 10 lb trash disposal unit weights!
Something like that might work. That is some serious corrosion though, is it possible he has a ground wire running through the radiator?



80 CJ-7.
It runs