Signing up is free, and you can do it anytime before the race....and you can go back and change stuff, in general for your team
All that "signing up" does really, is reserve your number. We "sign up" for all the races we want to do for the year around December.
And if you "sign up", you can also withdraw from the race any time
But, once you "sign up" you will need to pay up...by deadline
There is an initial "deadline" (approx. 8 weeks before the race) but actually you can pay, up to approx. 3 weeks before the race, without penalty, if not sold out. In fact, I think you can actually show up, and pay at the day of the race, but with an extra fee (?a few extra benjamins...
But the way the way it seems to work these days, is on a "First come/pay, first serve", system. Until the race is sold out
The Pittsburgh track seems like a popular attraction, so it might sell out.
And I agree with the suggestion of just buying a "ready" car....since the Pitts race only 3 months away.
Even if you get a "ready" car, there will likely still be stuff to do: buy new tires, change brakes and flush lines, maybe fire suppression, stock up on fuel jugs, cart, safety clothing, arrange towing, check harness for expiration, check stuff including exhaust, belts, etc.; theme,
So seems the smart way to go would be to get the car first....
Having said that, actually the Lemons way, is often not the "smart way"...full of procrastination and last minute decisions...
MarioKart Driving School: 1987 Honda Prelude Si (Opus #28)
Loudon, NH 2014 - Millville, NJ, Lightening 2019 (RIP)
New and improved: 1987 Honda Prelude Si (Opus #11) Pittsburgh, PA 2021 - ??
and finally won something, Class C Win: Loudon, NH 2022