Which jet sizes?

Hey everybody. I've got a '77 newport with an estoril on it and it seems pretty clear now that I need to rejet. The 12mm bing on there has a 58 right now, and I'm ordering some jets from treats tomorrow or the next day. Just wondering what would be a reasonable limit for jets to order...

I should mention I'm also planning on upgrading to a 15mm carb, so what do you guys think? 76-78 seem like a reasonable top limit for what would be needed?

Thanks

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