Same as Trent said some times it's easier doing it out side the truck. But also it might cost someone more money in the long run to get the ac recharged or if while pulling the motor they forget to unbolt somthing and get in a hurry and break something then they would of been better of taking there time doing it in the truck. Also if you do it in the truck buy yourself a topside creeper most places I found they come with a nice tool tool tray that matchs it think notheren tools