I would thing Shirley Muldowny would be the oldest and that one of John Force's daughter one of the youngest. .
Update - Shirley has to be late 60 early 70s! She around my Dad's age who owned a Drag strip in Michigan that she and Connie Kalitta both raced at on occasion, never saw what else they did, lol. John Force's daughter is early 20's at most so I would say a 50 year difference without verifying the facts! Now I'll verify and let you know! Yikes
OK Verified Shirley Muldowney June 1940 she is 68 and Ashley Force is 25 so you have 43 years difference. There is also Courtney Force and she is 19 so you have 49 years but she doesn't have the name of Ashley
There is Danica Patrick I just thought of and checked she is 26 so Ashley is younger
