I'm looking towards getting a 1970 Mustang Fastback from my cousin-in-law that is COMPLETELY restored. He lives about two hours from me and I was planning to drive the car home but he said with the C6 + 3.73 it will only be able to do 55-65mph and suggested that I might want to rent a trailer...Can anyone tell me the around about RPM the car will be at going 65-70mph?