Brown emerged as a key contender for the Triple Eight seat, which will be vacated by NASCAR-bound Shane van Gisbergen, over the Sydney SuperNight weekend.
It now appears that a deal will go ahead, with Brown and T8 well advanced with negotiations.
The move will require Brown to break his existing contract, given he is technically locked in at Erebus until the end of 2024.
That was seen as a major sticking point given there is little love lost between Erebus CEO and the T8 organisation, particularly amid their tense battle for both the drivers' and team's Supercars titles this year.
Autosport understands that Erebus majority owner Klimenko has been pivotal in helping Brown orchestrate his early exit.
Whether there will be a financial element to the contract release is not clear.
Erebus has been the surprise of the 2023 season with both Brown and Brodie Kostecki in title contention.
The front-running form has seen Erebus boss Barry Ryan come to blows with T8 on a number of occasions, most recently in Sydney when he was fined for swearing on TV after van Gisbergen moved Brown aside while they battled over third place in Saturday's race.
Source: Autosport