When I took the radiator to a renowned shop to get cleaned I was told since the radiator had deposits on the bottom, it would leak like a sieve if he cleaned it, so he advised I just run it as it was if it wasn't leaking, to save money, since it isn't going in a street rod or daily driver. He said if anything ever started leaking, use Aluma Seal, as he wouldn't trust Bars Leaks in his own radiator. Had another local mechanic friend say that too.
I was just going by what I was told by the shop. I'm not saying they're right, just what I was told.
