1. Standard practice for receiver height is to measure from the ground to the top of the square opening. Be sure you are all comparing apples to apples. Measuring to the bottom of the hitch could give inconsistency due to metal thicknesses.
2. Anyone needing a replacement shank, definitely check etrailer.com. They have a lot to choose from, including 2.5". I needed more drop than was provided with my Equal-I-zer, and found what I needed for only $75.
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller