I Have fixed some bad one's . I used a chain come-a-long and chained the truck down . Make some measurements from the good side and start pulling . Just don't over pull or you will tear the un-frame . A big hammer also helps . The last frame I straitened was on a E250 Bread truck 12/07 it also needed a new flip front end . It may not be 100% but you will have a usable truck when your done . At work we have sent some out to frame shops ? Looks like we do better work in-house .