battery choices / recomendations

Any recommendations for a battery ? I have been looking at Optima's but they don't list any as direct fit, it looks like there are choices that may physically fit but not sure if there is one model that is a better fit then others. I have not been able to find out what the cranking amps should be for an LS1, I have seen anywhere from 500 to 750 C.A. listed. I am not stuck on using an Optima so any proven set up is appreciated, this would be going into the stock 944 turbo location and it's an 86 if that matters, and basically stock compression LS1 no huge audio or anything else that I would think is power hungry.
Again thanks for any help,
Jim

I have had good luck using the Odyssey PC925, no issue at all turning the engine over even in colder temps. Initially was using the even smaller PC680 which was a leftover from the original engine, that had no issues turning it over either.

ive got an XS power s925 in my car. its rated at 550ca. they have a few others in the 750ca range as well. used their batteries for a while at work, they are far better than an optima.

here is my battery in my shops custom battery mount

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Thank you guys I appreciate your time !

What are you using the car for, track only, street/track, street only? The 86 I just bought is a street/track car and the previous owner put a 25 lb. gen 1 Mazda Miata battery in the stock location. Stock batteries are probably around 55 lbs. However, my car doesn't have stereo, a/c, extra electronics, etc. and is on a charger since it's not daily driven, works great and it's $110 at local auto parts store. You will need to buy or make at least a custom hold down, maybe even a tray, but that isn't a big deal.

If it's more of a street car with stereo, a/c, etc and don't want to deal with charging, just put a stock type no-maintenance wet cell back in. Since it's not in the cabin area it doesn't need to be a sealed gel cell, but those are nice if you want to spend the extra money.

My car sits in storage 90% of the time, i have a disconnect switch on it so i dont run the battery down. That battery has sat for two months still connected and cranked the LS over without issue in the winter. I have a PC925 in my '88 911 also, mostly a weekend and nice weather car. No frills with the electrics on that car, I rarely use the radio with the flat-6. Never an issue starting that up either.

I had a PC680 that must have been one of the really good ones, that battery is probably 7-8 years old now, that was in my 951 when it was still daily driven with the turbo engine and still cranked the LS without issue. That battery now is in my friends '03 Evo, i am a believer in the Odyssey batts!