Battery Selection

I have a '71 cl350, and I installed the Shockwave electronic ignition and also did the white/yellow wire stator coil mod. Do you think an Antigravity 401 (4cell) would be sufficient to run it? I have a standard headlight and LED brake/running lights, fyi. Any other small battery recs appreciated. They recommend it for up to 350cc if racing, and up to 250cc if daily. I feel like I'm right on the cusp.