Scott Speed is confident that he can make his NASCAR Sprint Cup debut before the end of this season.
The Red Bull-backed American will test a Cup car for the first time later this month, and has been racing in the ARCA and Craftsman Truck series this season after losing his Formula One drive with Toro Rosso 12 months ago.
He hopes to continue full time in Craftsman Trucks next season but also wants to include several Sprint Cup outings.
"I'm about to start testing, proper testing, in a Cup car with (Red Bull's lead driver) Brian Vickers," Speed told this week's Autosport magazine. "The car is quite a bit different from the Truck, but if it goes well, and I think I should be able to adapt, then we can go racing."
Speed also demonstrated Red Bull's Toyota Camry Sprint Cup car at the Zandvoort DTM round last weekend.