Andretti Autosport have confirmed 4 cars for next season. 3 of their drivers are already confirmed. Regarding the 4th entry, Rob Edwards says "We're hopeful of keeping (Carlos Munoz), but there are two or three others we are speaking to in case Carlos does something different."
http://www.racer.com/indycar/item/13...-cars-for-2017
Meanwhile, AJ Foyt Racing will have Chevrolet Engines next year. Larry Foyt says the contract is yet to be finalized "but it looks like we're headed that way."
http://www.racer.com/indycar/item/13...witch-to-chevy