You only need a dry cell to pass tech in certain racing organizations. I have never had issues passing tech with SCCA for autox events with a wet cell battery without a box around it in the trunk. I removed the spare and all of the metal bracing that mounted it. Also lot of us move the fuse box behind the front bumper. You can do this without cutting any wires.

98 Eclipse GS Turbo
Built motor - MS2 - Holset hy35 - Zoom Stg 4 Clutch - 57.5mm TB - ARP Headstuds - Turbonetics wastegate - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - 650cc Injectors - Fidanza Flywheel - Cobra calipers w/ 13" Rotors - Oil Cooler - DevilsOwn meth injection

1981 Chevy Scottsdale
1987 Nissan 300zx - Chump Car
2001 BMW 325i