the engine rule is a little different at Daytona 500 [just like qualifying] then the other 35 races, teams must run the same engine from Saturday’s first practice session (Feb. 10th) through the Duel 150 mile qualifying races (Feb. 15). If a team makes a change, then it must start at the rear of the Duel 150 field. After the Duel 150 races, teams can make an engine change before the next day’s practice session. After that, if an engine change is made, the driver will start at the rear of the. So far it looks like two teams have changed engines: #22-Blaney, #23-Skinner, and looks like #55-Waltrip may change an engine if the car is returned, so those drivers will fall to the rear of their respective Duel 150’s.(from 2004 but as far as I know the rule is the same)(2-13-2007)
