Jake Kostecki and Zane Goddard will also complete maiden full-time campaigns for Matt Stone Racing, having shared the #34 Commodore via the SuperLite scheme.
However, the early winners of the off season were Will Davison and Anton De Pasquale, who earned plumb call-ups to DJR.
Armed with their best chances yet at a championship, with title-winning machinery and expertise at their disposal, the expectations of Davison and De Pasquale are high.
The DJR duo won't be the only drivers taking the reins of Mustangs in 2021, with David Reynolds and Tim Slade locking in significant deals for the new season.
Slade has, though, combining with Scott McLaughlin for last year's Great Race. The former Brad Jones Racing driver missed out on a full-time seat in 2020, but didn't disgrace himself on the mountain last October.
Regardless, the two-time race winner's deal with the revamped, independent Blanchard Racing Team may take time to gel, despite Tim Blanchard making some key recruits in the engineering and management departments.
Erebus, meanwhile, has undergone more change than its rivals, losing its title sponsor and both its drivers.
Coulthard appeared to lack confidence at times as team-mate McLaughlin dominated in Shell colours. However, armed with leadership at Team Sydney, a renewed Coulthard will have no baggage to carry over into 2021.
2016 Super2 champion Jacobson has bounced from team to team since he made his main game debut in 2017, but racing alongside a decorated driver in Coulthard can only improve his performance.
Critically, Team Sydney acquired the services of race engineer Dr Geoffrey Slater, who skippered the team's 2016 Bathurst triumph.