You know it's temperature related, you know it started after the installation of an AEM A/F gauge, changed to an LT-1 MAF with translator and added a powerlogger. First when you get the error confirm the what the voltage reading is at the 5V wire the gauge is reading. Next buy a can of that...
Problem is anyone who has held on to an original battery this long is probably not going to part with it. I believe in order to reproduce it they will end up up cutting an original apart to make the molds. Might try over on the Corvette forum and see if anyone over there has one.
Not as active as this one, but covers all of the SHOs since 1989.
Also have a look at the SHO Club
Been around since 1992. Every year we have a convention that is a lot of fun. Always includes 1 or 2 track days (road...