my dad is looking to retire and is going to sell his 1970 R/T SE 440 4 speed challenger with factory power steering, power brakes, front disk and leather interior. It is all original minus a quarter panel repair and the original carb. Runs strong absolutely no rust original paint and top is in really good condition. Car needs a little tlc but not much shed or garage its whole life. We are having a REALLY hard time nailing down a rough value of this car. We were told only 143 of this specific car was made but like I said we are getting so many different values and conflicting info can you guys help?