The stealer has a battery that meets the specs for our trucks.
I did not purchase one of those though, I bought a Red Top Optima Blem at a swap meet about a month ago, it is a larger size than the standard ones they sell at places like Costco, don't know the specifics on cranking amps but it really turns the mighty Cummins over quickly, it's been in the low thirtys in the mornings this week and it turns the truck right over, even the one morning I turned the key before the wait to start light went out.
Happy Rammin,
Caleb