B body tank in A body

Ok Thanks for that. Ill post what I do. I may try a 219ish loc tight wicking thread sealer with a little heat. These pinholes are really only showing themselves with pressure in the tank. I like the warning about the galvinization of the inside of the tank and I will keep that one in mind for sure. As far as time until failure of seal because of ethanol and such....all good information. Wish me luck, maybe Ill chase down those pinholes with the welder after all and then prime/paint. Ill watch for leak and if it does at least ill know what it is.

Thank you for your replies