You know, the most misunderstood and used terminology when talking about handlebars is the term "Pullback". The true meaning is the amount of angle of the handgrips, measured from the bar plane to the end of the grip. In other words zero pullback would be that the grip ends would face directly left and right like a straight piece of pipe and the more inches measured of pullback the more the bar ends would face rearward like griping a wheelbarrow. True, there comes a point here if the "grips" piece were long enough eventually the rear facing ends would come closer to you with a lot of pullback. But, personally I know that for me the moire actual pullback that puts my hands farther from zero the worse it gets for comfort on extended trips. The most comfortable position for extended touring for me is with approximately 5 1/2 to 7 inches of pull back which puts the grip ends almost left and right with a height of 9 1/2 to 10 1/2 inches rotated slightly rearward in triple trees bringing them slightly closer to me. Although I do not have Harley heritage bars the after market ones I do have measure within fractions of the heritage measurments. They are about as comfortable as I've found so far for on a HD touring frame for long distance cruising and certainly more comfortable on the wrists, shoulders, arms, and neck than the lower stock style with a lot more pullback. For shorter people having a seat putting you farther up to front is a plus.
Everyone is different but to find the perfect feel for me you can do so by closing you eyes imagining your arms stretched in front of you and with wrists to elbows almost flat with a slight downward taper to elbows, the wrists relaxed and almost flat and straight and certainly not with pinky finger side twisting the wrists like gripping a wheelbarrow. In reality the wrists are very slightly angled rearward and slightly angled downward. Too high makes the arms tired for those really long runs like holding your hands over your head for a long time...try it. Too low and the shoulders and neck suffer more. Finding the right comfort position for me has taken years and years of long distance riding. What might feel comfortable for me up to 400 miles would leave me aching in 700 or 800. And like most things, the body's muscles will get stronger and adjust over time so that it's hard at first to evaluate what is truly your most comfortable position for you....but it will probably not be close to the original stock low, reaching bars on the Road King with too much pullback angle for those very long days in the saddle. Sorry for the long post. BTW, I'm 5'7"