I cook Chicken 1/2''s all the time my halves average 2-2.5 lb I cook at 325* and they they are done in 1 -1.5 hrs. I let them rest about 20 min. Since yours are smaller they will be done in about 45-50 min I never check thigh temps as the thighs reach temp before the breast if the breast is 165* the thighs will be 175-185. I cook skin side up.
I never met a Cow that I didn't like with a little Salt & Pepper! Certified PORK-A-HOLIC