Persist with the nap till 1.45pm. Then if awake let him be but put him to bed at normal time. If he sleeps wake him at 2.30pm.
He might need a longer time to wake in the mornings. On work days my two have to be up by 5.45am. So I put the radio on at 5.30am and turn lights on at 5.40am. That works well.
wifey of hubby who is always away. mother of two girls who are always amusing.