When you say cut to 29 inches, do you mean to back of point? That gives you two inches of arrow overhang plus the point. Nothing wrong with that, but most people get enough clearance with about one inch past the back of the bow.
Regardless, since you're not shooting a particularly heavy head, 60-65# should work well. Could probably get by with 5# more or less spine as well. In my experience, most bows will shoot a range of spines well, particularly those somewhat overspined. Get your supplier's recommendation as well and perhaps try a test pack.