The two top fuel classes changed to 1000' after Scott Kalitta died. Prostock and the rest still run 1/4 mile. There isn't a NHRA National event in the pro classes that run the 1/8th mile. I'd put money it's going to change to 1000' length before 1/8th mile. Even the 1/8th mile tracks that hold ET Summit series races during the year have to compete in the 1/4 when they race divisionals. They don't make an exception and let them race the 1/8th. In Div 7 west coast there is only one track that is 1/8th mile. It's an east coast thing.