"We just got run down. He went up three kilos the other day and the winner stayed on 54 kilos, and if we had met on level weights, he would have gone close to winning.
"If he gives himself the chance to settle over the 2800 metres on the weekend, he should see it out and be pretty competitive."
The first half of Saturday's race will be the key to Bold Soul's chances of running out the trip.
Noonan said Bold Soul can be keen early, but the Payne brother-and-sister training operation have Bold Soul racing in excellent form at present.
"He can be a bit bold and keen into the bridle and if you're doing that over 2800 (metres), it can be detrimental in the second half of the race," Noonan said.
"If he can do it right early, he can be pretty tough when he needs to be accountable. He's not necessarily the best horse in the race, but he's tough.
"He's had some good racing this time in, and it's seasoned him and he's probably getting better with the racing that he's had."