They prioritize more optioned cars when they are ramping up production of a new model, but they don't do that with Model Ss now. They do batch orders together based on color, options, and destination. They prioritize cars for overseas orders in the first six weeks of a quarter, and prioritize domestic orders during the second half of a quarter. They build and deliver some domestic cars the first half of a quarter, but a lot get delayed.
If there are other 60/75s of the same color ordered around the same time as yours, it's possible it may get built quickly. If there are few cars like yours in the queue, then it may be a while. This month they have been running the factory full tilt to get as many domestic cars into people's hands by the end of the quarter June 30, but at this point they are probably switching over to early Q3 production.