need some help with car value

hi guy i know this isnt the b body forum but we all like mopars on this forum. looking to buy a 1970 coronet 440 a few hours from my house, here is what the car is its a 318, power brakes, power steering, disc brakes up front, super clean car no rust on car at all one of fenders has a dent bigger than a door dent bench seat colum shift car, 67 thousand miles, paint is ok i think original not sure what i should pay for this car i know its hard to give an exact price but all park im looking for my plans are to pull 318 and stroked 383 or a 440 with 727 would that help value at all let me know what u guys think