Ingall, 51, will suit up with Jack Perkins, 29, and tackle the endurance classic, the Wilson Security Sandown 500 from September 11-13.
He has a test day next week to acclimatise himself with the car after retiring from full-time driving at the end of last year to feature as a FOX SPORTS commentator for 2015.
Courtney has given his old teammate and good friend permission to push the #22 HRT Commodore as hard as he needs to.
"Instructions for the Enforcer - live up to his name," Courtney told FOX SPORTS today.
"Enforce. Don't be 'the Accumulator' which is what he got labelled with later in his career. Fight, push on, don't be afraid to bend the panels - I'm not.
"We're there to win, be aggressive. We're racers and that's exactly what Russell is - he's a junk yard dog, I think if you cut off both his arms he'd be driving with his teeth.
"That's the sort of spirit I race with, and that's a big part of why 'big muscles' is in there. I'll be watching and I hope he gets in there and pushes some people out of the way."
Ingall is happy to oblige and when asked if he expected some retaliation from others on track after some of his comments to camera, Ingall said his competitors should be the ones to watch out.
"I think they should probably be fearful of me to be quite honest, the other way around," Ingall told FOX SPORTS.
"At least I can retaliate on the microphone later in the year!"
Ingall drove for the Walkinshaw Racing squad in 2012-13, but not in an HRT Commodore. Now he gets to cross that off his bucket list.
"I really respect the team. At the end of the day ... to be in those red cars, especially with some of the greats who have driven - Peter Brock and our own Mark Skaife, just to name two - to have my name on that list driving for the official Holden team is a big deal."
Two-time Bathurst winner Ingall hasn't been in a race car this year, but last suited up at the Sydney 500 in December and earned a best finish of fourth in Tasmania last year.
"There's one thing about motorsport - I only stepped out of these cars at Sydney last year. You don't forget how to drive these things and more importantly you don't forget how to race. I've always been strong with that," he said.
"I haven't raced anything this year ... but I've been racing these things for 19 years, and you don't forget. If this was five years down the road it might be a different matter but after six months, it'll probably be a bit better.
"I've calmed down a little bit. Angry Russ is gone, committed Russ is here."
Courtney was discharged from hospital on Wednesday and is on the road to recovery, though he is still in a lot of pain.
"Pain killers are magical things, so having a lot of those, but still it feels like I've gone 12 rounds with Tyson with someone tying my hands behind my head and just punching me in the ribs," Courtney said.
"So there's still a lot of pain - breathing is still a big issue - but I'm here."