Yes, UH-1H = 1400 shp
UH-1D = 1100 shp. The extra power came in handy on very hot and humid days, more power then could be used, so had to watch the torque meter.
BTW, there was a dustoff unit at phu hiep, directly off our eastern end of the psp, next to the beach, somewhat closer to the AAF next door where the hooks and cranes were located.
Regards the extra hp, that and a little extra right pedal sure helped to get a full load out of the hole.