The latest import to find his way into Tulloch Lodge could challenge Makybe Diva's sister as the most promising stayer to emerge from the WJ McKell Cup meeting at Randwick.

Excess Knowledge will make his Australian debut with a Timeform rating on a par with trainer Gai Waterhouse's Melbourne Cup winner Fiorente at the same stage of their careers.

But that's not where the similarity ends as Excess Knowledge, a Blake Shinn mount, sports the silks of syndicator Round Table Racing for the first time in the Hyland Race Colours Handicap.

As a son of Monsun, Excess Knowledge is by the same sire as Fiorente and he will tip the scales close to 500kg on Saturday.

"When Fiorente ran in his first Melbourne Cup at his first start out here he was 500 kilos and Excess Knowledge will be 495 kilos," Round Table Racing's Bruce Slade said.

"By the time Fiorente won the Melbourne Cup the next year he was 520 kilos."

La Amistad, a three-quarter sister to Makybe Diva, will be out to continue her rise through the ranks in the Listed McKell Cup (2400m) as Excess Knowledge will be trying make an impression over what appears to be an unsuitable 1400m.

The team behind the deal to buy Fiorente has also been instrumental in securing Excess Knowledge who is a $15 to $9 firmer to make a winning Australian debut.

A winner over 1600m on debut as a two-year-old, Excess Knowledge first came to the attention of Waterhouse when he was beaten a head in the Group Three Gordon Stakes over 2400m at Goodwood in July.

"Fiorente ran second in the same race as a three-year-old," Slade said.

Slade said close to half of the owners involved in Fiorente had taken shares in Excess Knowledge, a horse he envisages will be at his peak for the 2015 spring carnival.

"He is a very progressive horse who has acclimatised like no other horse for Gai," Slade said.

"Gai thought that while he has adapted to well to her systems she may as well get him used to the Australian style of racing.

"But in reality we are aiming him up for the 2015 Cups."