Using a york mdl t874r1046 on a new pkg.heatpump wiring c wh1 r y o g how do I hook up.

York doesn't make thermostats that I know of. You have a York heating/cooling system with a Honeywell thermostat. The T87 is a honeywell stat for sure. Other than that, I can't be of much assistance, as with heatpumps, the thermostat wiring can get a bit involved, and is best left to onsite techs.