Nichols has the gelding nominated for the Listed Anniversary Vase (1400m) and a handicap over 1200m with weights favouring the shorter journey.
“The preference would have been to run with 54 (kg) in the Listed race but he now rates 101 and he's got 59 and no claim,” Nichols said.
“So we'll run in the 1200-metre race with 60 kilos, less three kilos for (apprentice) Michael Poy.”
“It's a remarkable thing for a horse like him to continually improve through his four-year-old year and who knows, if he improves again, where he'll end up,” Nichols said.
“It's been a great ride but the handicapper is starting to catch up with him now.”
Nichols hopes to return to stakes level with Streets Of Avalon at his next start which could be in the Group Three Victoria Handicap (1400m) at Caulfield on April 20.
“He's a genuine Listed, Group Three class horse in the handicaps where he can get in down in the weights,” Nichols said.
“Hopefully something wants to keep away from the wet tracks in Sydney and will come down and help us out.
“Races like the Toorak Handicap, they're probably too strong for him, but down a grade or so, that might suit him.”
Nichols said Streets Of Avalon was likely to have a short break and get ready for a trip to Brisbane for the back end of the winter carnival.
Stablemate Tahitian Dancer, also a winner at Mornington on March 23, is Sydney-bound for her next start.
“She's really come on since her first-up win,” Nichols said.
“She worked the Sydney way on the (Mornington) course proper this morning which was outstanding.
“She's chasing the softer tracks and is a chance of showing up in Sydney whether it's this week or the week after.”