Found my dads original 1971 duster!

Hey guys. Quick question. I got home from a drive and noticed a very slight pinhole leak on the top of rad where a previous repair was done. I’ll include a picture. Would regular plumbing solder work to repair it? I’ve soldered many household plumbing fixtures and even complete houses when I used to build. Just not sure if the solder is the same. I know they make a JB weld for rads too. Thank

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