This is how I did my Group 27. The same battery should fit inside a Group 24 based on the dimensions. https://www.forabodiesonly.com/mopar/threads/battery-gutting.440367/#post-1972606623

PC925

Length inches (mm) 6.64 (168.6)
Width inches (mm) 7.05 (179.0)
Height inches (mm) 5.83 (127.0)

A messy job!!!

Jim

1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL