I had my aging heat pump replaced with a gas furnace & air conditioner. The heat pump air handler & strip heat backup were on a 70 amp breaker. The electrician converted one 120 v leg to neutral & added a 20 amp breaker to supply 120 v to the new equipment. It seems to me I can move the neutral leg back to the 70 amp breaker, add a 40 amp breaker for the new 32 amp 6-2 line. Where do I route the existing 120 v neutral after the conversion? Tie in with 240 v ground? Main 200 amp panel uses 3 wires with neutral & ground connected. Pic posted of cutoff configuration. Am I missing anything? Just considering my easiest options before getting an electrician quote.