360ci Oil and Oil Filter

So I know the past owner of my 72 Demon changed the original 318 to a now 360 and it's time to change the oil and most sites I look to buy an oil filter at doesnt list the engine for my car. I thought I could just look at the filter that's on the car now but I didnt see any labels or markings on it so that didnt help.
Can anyone help suggest a good oil filter that would fit in that 360?

Also, I have a tub of dino Castrol GTX 10w30 around, I'm assuming this should be good enough to put in or do I have to get a tub that specifically calls out zinc as an ingredient? I know I sound like I'm new at this and that's because this is my first classic so I'm trying to learn and not fk things up as I'm going.
Any input is appreciated.

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