My 1979 Jeep CJ-7 w/304 V-8 appears to have a slight coolant leak at the seam towards the bottom, 10 drips on the garage floor after 1 week of not driving. Radiator is the original Blackstone and I believe it is brass. Jeep has 38k original miles and I am driving it to the beach next Friday, trip is about 4 hours. I am willing to roll the bones and try some stop leak, any recommendations? Bars has about 4 different products for this, thanks.