I just got one thing to say bout this whole discussion.
Had Old Blue, my total stock 1950, 3600 for 13 years, and
16,000 miles, which is driven Summer thru Winter, weather
permitting and I've only had 2 (6v Farm & Fleet) batteries in
her, and the second one I installed a few years back just
because I thought it might be time, not because she was
starting hard.....and.....I've never, yet, had a problem with
that old 216 starting no matter the weather.
Keep them tuned and clean and they'll run just as well as
they did when new.
Denny Graham
Sandwich, IL