If I remember right, 327s first came out in 1962. I don't know if they were in '63 pickups, but I had a '66 with a 327.
What's the condition of the motor? If you are trying to spend minimum dollars you can get 350s for free and they are cheaper to rebuild. So if price is most important, unless he wants nearly nothing and the motor is ready to install, its probably the wrong motor.
If having a 327 is important its a different story.