Skuzzy I also owned a 69 road runner.  Vitamin C black vinyl top.  bought it new in 69.....as I recall with tax etc. 3400 dollars.
Put a 4.33 rear end in it.  You can prolly guess where it went from that point  
Was a great car to drive.
I bought my 69 in 71 for $800.00.  It was immaculate. Road Runner yellow, 383 and 4 speed, no A/C, no power steering.  Before I was done with it, she was laying 650HP+ at the rear wheels and winning in the modified stock class.  She could pull the front tires about 6 inches off the tarmac in the runs.  I loved that car.
Makes me sick to think of what she would be worth today.  Recently saw a 69 auctioned off for $150,000.00.