Is An A Body Worth It?

You have the original motor, sleeving it is $75 Per cylinder, I would rebuild that! That is irregardless of the value of the car, but will help increase the value if it has the original motor, and it's badass!! You have all of the parts already, why go out and buy more just to build a great motor?? Now, if you find a great deal on a drop in motor, by all means do that and keep the original block!!