Large battery for my 78 developed a crack in the case and died.

Took battery out of my 914 and the car cranked right over. 928 Hasn't been started in 6 months. Little battery has 450 cranking amps. vs 1175 for the monster that is called for.

Volts good seems to be charging fine. Preety cold this morning @ 40 degrees. Ya ya but this is Mississippi.