Port Macquarie trainer Tas Morton is more certain of his immediate plans for Nuclear Class than he is of getting the jockey he wants for the mare's return to racing at Rosehill.

Nuclear Class has 59kg for an 1100m race on Saturday and Morton was still trying to lock in a suitable rider less than 24 hours before acceptances.

"I'm looking around for a good three-kilo kid (apprentice) because she's an easy horse to ride," Morton said.

Apprentices have been in the saddle in four of Nuclear Class' nine wins.

Nuclear Class rates up with the best sprinters trained in country NSW and Morton will use Saturday's sprint as a lead-up to a time-honoured bush race.

"She is heading towards the Ramornie and Saturday's race will be a stepping stone towards that," Morton said.

A $150,000 race decided at Listed level, the Ramornie Handicap is the main sprint race during the Grafton Cup carnival and it will be run on July 8.

Nuclear Class hasn't been to the races since breaking a long-standing track record in the Armidale Newmarket Handicap in March.

But evidence of her sprinting prowess emerged well before that win after a Group Three Concorde Stakes placing at Randwick and a Hurricane Stakes win during the Newcastle Gold Cup carnival.

Nuclear Class' Rosehill stiffest opposition is expected to include Brook Road and Straturbo, two sprinters who are also resuming.

Brook Road raced below her best in a two-start autumn campaign but her spring form included a Group Three placing behind top mare Avoid Lightning and a Listed win at Doomben.

Straturbo was scratched from Saturday's June Stakes to be saved for a return in benchmark grade.

The five-year-old enjoyed one the better moments of a career that has netted six wins when he defeated Happy Galaxy and Missy Longstocking in the Magic Millions Sprint in January.