I think the '01 V8s came through with 850s, then downsized a bit to that 720,
except for some of the 4.6s. I typo'd on that "760" I have: the orig was 720,
as is my replacement...NEway, if the OP's batt is a replacement, (good bet),
he is still working on several years on that replacement. Imo, I would cop a new
720 CCA batt for that fun western MI winter.
BR,mD