Arrow rest location is dependent upon how you intend to grip your bow. Low wrist 2" (hard heel grip), medium grip 1 1/2" (common for many of us) and for a straight grip around 1" to 1 1/4".
For a bow of that length, with longer heavier limbs, which will have more moving mass, I would go with a straight to medium grip for best timing/less handshock. Just my opinion of course........Art