Amarula, who has a Hawke's Bay Guineas success to his credit, had also won his previous start at Te Rapa under 60kg.
"He enjoys his racing and he'll come back here in a couple of weeks when we'll step him up to 2100m," McKay said.
Amarula will be tried for stamina with a view to confirming a tilt at the group 1 Livamol Classic at Hastings where he will also target the group 1 Windsor Park Plate over 1600m.
"I think he'll go over more ground and I'm looking forward to riding him in the group races next season," said McKay's son Shaun, Amarula's regular rider.
"He's a really tough horse and once he gets to the front he doesn't let them go past him."
- NZ Racing Desk