Coolant tempature

[truckin 79]

I recently had 6.0 changed in 2207 Avalanche due to spun cam bearing. With old engine temp at gauge was always a rock steady 210. With the rebuilt engine when idling at stop light it slowly creeps past 210. Would this be because displacement on demand is disabled on truck. The vlom was changed and so were the lifters to delete engine. I know this is not a major difference in temp but I am worried in the hot summer months truck will just get hotter. What temp is worrisome for a 6.0 engine 260 or 240?