google is your friend
road runner build numbers 71 road runner production numbers 71 road runner option percentages the above production numbers might differ a little bit depending on the source used to publish.
the percentages are figured on TOTAL build numbers. their are no actual numbers on how many high impact paint, air grabber cars with 4 speeds. that number doesn't exist because mopar never spent the time to publish it.
the only real numbers are 71 road runners with 383, road runners with air grabbers, and road runners with 4 speeds. any numbers more detailed than this are just a guess.