I think the battery manufacturers / Mustang parts houses are missing out here....
The only reason to have a correct appearing battery is for concours show use.
Plenty of people use old, dead batteries for show.
Why not just manufacture exact reproduction empty CASES for each year/group without any guts FOR SHOW USE?
If a user wants to modify it with a small cheater battery, make a kit available, or let me fill it with water/leave empty.
Can't be too outrageous to do, given all the 3D printers and open CNC machining time available.
I need a 1983-1986 BX-63 battery. DEAD ones run $500 (ridiculous IMHO). There are NO live ones available, so I'm stuck with either building a dummy OR using the "current" group 56, and/or lugging around a dead/gutted BX63 anyway. Since there is NO requirement for the battery to be functional, why not just build cases for show use and be done?