Larry...
I had a leaky radiator in one off my el Camino's. I used the bars leak with good results, flush with clean water for a week or so and I also put 3to4 tbs. of laundry soap (like tide powder not liquid)to help clean out the crap! Worked for me. Sold the car 6 monthes later still no leaks.
Good luck
Curt
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