“Nah, you’re good Frase’ sixty’ll do fine.” So it's the contraction of 'sixty will' that I'm wondering about.
I struggle to imagine anyone not understanding it, but I'm sure there's people who'd reject it. Unto them say I: "Piss ye off." Reads fine to me; I do the same myself.
I understood what it meant right away, and I imagine most other people would as well. I'd say you're fine
Got to have either a . or a , after Frase’ otherwise it sounds slightly off aloud, other than that it sounds fine as sixty’ll
I thought Frase was someone's nickname. For example: Nah, you're good Joe. Sixty'll do fine. I'm trying to convince myself it could be a comma. Since it's dialog, all bets are off. I keep hearing a period though. In dialog you want to get the grammar right when it should be right, but you can smash it to bits when you need to, which is often. Don't hesitate. Dialog is 9 parts style vs 1 part grammar, and the style is as lazy as a Saturday morning. I always look at the bare minimum just to get a feel for it. Nah. Sixty'll do. Nah, sixty'll do. Nah, you're good. Sixty'll do. Nah, you're good. Sixty'll do fine. Nah, you're good, Frase. Sixty'll do fine. Nah, you are good, Frase. Sixty will do fine.
It's dialogue, you can do what you want. And I also say there needs to be a comma before the name, as in: "Nah, you're good, Frase. Sixty'll do fine."