Insurance companies are given a "financial" report card with exact same letter marks. The company who grades them is referred to as the A.M. Best Company. Their purpose is always to protect through buying insurance from a company in poor "financial" appearance. When you buy insurance your broker should tell the grade within the company he/she is pricing. It is safest to buy insurance using a company which a letter grade on the or truck mounted crane maintenance B at a minimal.
More headroom allows the trucker to truly stand ambulance inside the cab. More headroom also provides a nice open feeling to any space; which appealed with me and my sense within the outdoors.