I just tried at the server and I foresee a "slight" problem with the fuel at 2x. I´m going to need 210L(55.4 gallons) to complete the race and my fueltank only holds 180L(47.5 gallons)
I second that.
Maxed out fuel with the Ferrari is sufficient for 29 laps. Checking another car, in the Ligier it's enough for 31 laps.
Sorry, but this will in no way be sufficient for an 1 hour race and since we (afaik) can't pit in to refuel with the 1979 cars I can only recommend to set fuel to 1x.
Likewise I'm a bit sceptical about wheels at 2x. At least in a qualifying stint my quali wheels went yellow already in the 2nd lap (the first timed one). Obviously this will be less of a problem in a race.