Used lots of different types of batteries (with high cranking amps) over the years and all generally good, with biggest improvement going to better gauge cables. Some leaked over time, some didn't. As my engine bay is less original than before, a couple years ago I replaced my battery with a Optima Red Top OPR8004-003, 800 cold cranking amps and 1,000 cranking amps. Won't leak in my now clean compartment (although that never was really a concern). Works great, and haven't had a slow starting yet, which happened off and on before.
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