Conway made his IndyCar debut in 2009, finishing a season-best third at Infineon. He missed most of 2010 because of leg and back injuries sustained in a frightening crash on the last lap of that year's Indianapolis 500. Conway collided with the slowing Ryan Hunter-Reay, and Conway's car went into the catch fence.
Last season, the 28-year-old English native drove for Andretti Autosport and earned his first career win at Long Beach. It was his only top-five finish in 17 starts. He had two other top-10 finishes in 2011.
Foyt, a four-time Indy winner, will use a Honda engine and plans to test the new car in February.