Since we now have several members running the 77-79(standard) stock exhaust how do you measure the axle position? The mufflers cover the axle so measurment from a set point to center of axle is impossible? The cast markers on the swingarm are reliable? Measuring from the rear block to the adjuster (the gap) reliable? Measuring the length of the adjusters bolt, reliable? After it is set adjusting by the number of flats you tighten the bolt is a piece of cake, but getting the initial starting point what is your plan of attack?