I changed my 57 over to a glass-matt battery. Took a bit if doing, since I didn't want to cut anything up beyond the top mounting ring. You really have to do your homework to do this, as no one makes a glass-matt battery that fits these 1956-1964 cars. Getting it (a unit) to be short enough so as not to dent the inside/outside of the hood was a major consideration.
I wanted the most amount of power I could get, with reliability. It sure cost me too $$$