[StingRay]

As CCA goes you should have a minimum of 1 CCA per cubic inch to start an engine when it's about room temperature. For very cold climates a minimum of 2 CCA per cubich inch is the bare necessity. A 900 CCA battery will start my truck with a 350 in well past 40 below zero. A 900 CCA would however just barely crank my Dad's 454 over in sub 40 below and actually starting at those temps was hit and miss. For high compression engines the requirements are higher and for engines with gear reduction starters the reqirements can be lower.