"He's got a bit of weight [60kg] so it remains to be seen how he copes with that," Murdoch said.
"He will be better once he gets to a mile, but he is forward enough to run a cheeky race."
The stable is also looking forward to the return of the promising mare Sacred Siren in tomorrow's Balance Agri-Nutrients 1400 at Te Rapa.
"She's trialled up nicely and she's quite a light type of mare so we don't need to do too much with her."
Sacred Siren has won twice from seven appearances and the O'Reilly mare, a daughter of the NZ St Leger runner-up Striptease, will be having her first start since December.
A bold first-up showing at Te Rapa tomorrow is expected from Sacred Rebel.
The Sepoy youngster goes into the Visions 1200 off the back of an 850m trial success at Taupo last month.
"He won his trial nicely and he's a really good type," trainer Tony Pike said. "He's still a bit new, but on raw ability he should go close."
- NZ Racing Desk