Beautifully Broken (The Maple Grove Series Book 1) by Cassandra Moll

Six years after aging out of the foster care system where he was bounced from house to house, Jay is trying to make a life for himself as a mechanic but can never seem to escape the darkness of his past - until he meets her.
Stuck at a crossroads of maintaining an old dream or following a new one, Claire, a middle school English teacher from a loving home, is quickly realizing that starting over can change everything. 
When fate, and a 1974 Ford Maverick, bring these two together, they learn sometimes opposites do more than attract and even the most broken people can help put others (and themselves) back together.