Products of Isstoora to chase Valley features 40 minutes apart this weekend.

Peter Moody remains unsure where Desert Lighting will end up this spring, but the Hall of Fame trainer is looking forward to getting some sort of guide on what shapes as a big day for members of that equine family.

The Group 1 -winning miler will chase his first victory in almost 12 months in Saturday's $200,000 So You Think Stakes (1500m) at Moonee Valley, 40 minutes before his younger three-quarter-brother Oak Hill runs in the main event, the Moir Stakes.

Moody and co-trainer Katherine Coleman have nominated Desert Lightning for the Cox Plate and even the Caulfield Cup, so options are open with the gelding who resumed with a fine second placing to Private Eye in the Group 2 P B Lawrence Stakes (1400m).

"That's the perfect race for him," Moody said of the So You Think Stakes, for which Desert Lightning is$2.30 favourite.

"It's set-weight-and-penalties with 58.5(kg). If it was a handicap he'd have 63.

"He's in good order, he goes there well and off his first-up run you'd think he'd run well in that grade."

Desert Lightning and Oak Hill are evidence of how different horses can be despite coming from the same mare.

They are both out of the High Chaparral mare Isstoora by a son of Street Cry. Six-year-old Desert Lightning is by Pride Of Dubai with Oak Hill, who is five, a son of Per Incanto.

Oak Hill hasn't started beyond 1200m and has been kept to races over 955m or 1000m at his past eight starts, while Desert Lightning has won from 1100m out to the 2100m of the Group 2 Avondale Guineas.

Then trained by Peter Williams, Desert Lightning headed to the Group 1 New Zealand Derby (2400m) after that and finished eighth, beaten 3.4 lengths by Sharp 'N' Smart.

He has had eight starts for Moody and Coleman, starting with a third placing in the Listed Chautauqua Stakes at last year's Moir Stakes meeting, with his lone in Australia coming at his following start in the Group 3 Sandown Stakes (1500m).

Desert Lightning and Oak Hill trace back to one of the best, and most versatile, families in the studbook.

Isstoora is out of the Giant's Causeway mare Murjana, a Group 3 winner over 1200m, who is out of the Danehill mare Twyla.

She is a three-quarter-sister to Redoute's Choice, but also Spring Champion Stakes winner Platinum Scissors, which means Blue Diamond winner Hurricane Sky and Group 1-winning Cox Plate runner-up Manhattan Rain are also part of the family.