Originally Posted by Wild Karrde
I currently work for a major battery company, and we sell a LOT of automotive batteries.
Use the biggest one you can fit in there. It won't damage anything in your electrical system. My '85 has a 1,000 CCA Marine Deep Cycle Starting battery in it, and my '89 has a 750 CCA automotive battery. Driving and starting, I can't honestly tell a difference most days, but I like the added insurance of having more power if I need it.
The rated CCA for a typical Ford truck with a V-8 is around 650, but that's an average. I recommend going with as large as will physically fit in your vehicle.
When it comes to cranking power in a battery, there's no such thing as "too much", only "not enough".
Thanks Wild Karrde...The 900 CCA is only $20 more than the 700 CCA I was looking at. Will take the advice and get that one. I was a little worried I would damage anything with a higher rated battery. Why do you have a marine battery in your truck, any advantage to those, or do they just put out more CCA?
Thanks
Itch