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Yes, the NAPA Commercial is a very good choice. Gobs of capacity and typically gave 6-7 years of trouble free service.

It is also a good idea to use a battery maintainer when the cars are not used regularly. I have a 5-year old conventional type battery in my 99 BMW Z3 and a much older Optima in my 32 Ford Coupe. Both are on maintainers when not being driven and continue to perform well. I will replace the BMW battery when it fails with an Optima as it is in the trunk area of the car.

The 12v batteries on my 1965 Cadillac and 1985 Plymouth Voyager Magic Camber are more that 10 years old and going strong as I leave them connected to a solar maintainer with a large panel on the shop's roof. There are extremes in temperature where my shop is so a maintainer is a requirement in those conditions, especially the cold!

I do NOT have one on the 6v Napa Commercial battery on my 1954 Patrician and just had to replace the battery which was barely 5 years old so I need to come up with something for it too.

Monsignor Shields, just ordered one direct from Optima, arrived in a couple days. Last one went a decade.

I know of a Cadillac V-16 that does just fine on a single 6-volt Optima. If the heavy lead acid battery's additional 175 CCA makes you feel better, mighty fine.
I'd rather adhere to "weight is the enemy" for any serious road car.

If trophy quest foremost, again, Jim's Battery Manufacturing, Youngstown, Ohio (800) 426-7580 can furnish appropriate fakey do battery cover that will placate any judge.

Su8overdrive, Optima certainly had better news for you now than they had for me back in July; they wouldn't even give me an estimate on when they would have the 6 volt batteries available. On the weight issue, saving 30 pounds on a 4,640 pound car that is rarely used would seem to me to be insignificant in terms of performance or fuel economy enhancement. In addition to the almost 20% greater capacity in the NAPA 7212, the price was $110.00 less than the Optima. That was an unexpected benefit in buying the Napa 7212.

That's the thing, weight adds up. 30 lbs. here, 30 lbs. there, pretty soon you're up to 100 lbs. jettisoned. Then 200 lbs. Losing weight an art, same as increasing torque/hp. Less is more.

Crying shame what was left of Packard in the '50s could do no better than glomming 200 lbs. more "sporty" cues on an otherwise stock convertible, the "Caribbean" aping dreck like the Olds Fiesta, Buick Skylark, Cadillac Eldorado instead of meeting or exceeding the Bentley Continental, considering Packard's earlier '34 Model 1106 LeBaron sport coupe.

Optimas have indeed gotten expensive, but again, a minimum of a decade vs. likely less, tho' obviously, some traditional batteries can go seven, eight, even on rare occasion, ten years.

A 6-volt Optima Red Top's 800 cold cranking amps enough to spin my 356's gear reduction starter, handily start a Cad V-16. My Cord friends like them because low voltage means no shift.

Am not affiliated with Optima or any other product mentioned, but figure the more business we steer them, the better pricing for us all. Usually.

Sounds like you got a good battery, regardless.