No. There should be no issues/problems, IF you go with a new tank and fittings. I replaced my tank, connector hoses, all that, all NEW parts, a few years ago, (during my restore), back behind the seat in original location. Been driving it almost every weekend since February 2019.....have never smelled gas, not do I hear sloshing.....it may be sloshing, but you ain't gonna notice it. And unless you go with a new sending unit in the tank, (and Jon G on here can tell you which one to use), your gas gauge is gonna jump around and not read correct. I tried two new ones, bought from two of the different usual suspects we all use to get pieces and parts, and they were both....(you know).
Safe to say, get the sending unit Jon G recommends....it DOES work correctly.
