Tumut's imposing forward pack will be without a key member with best and fairest winner Jed Pearce out of the clash with Young.
With Pearce unavailable with work commitments, new recruit Michael Fenn will start for the first time at Twickenham on Sunday.
Fenn has impressed in his first two games for the club and Blues co-coach Dean Bristow is confident he can step up to the mark.
"Luckily this year we've got some ample replacements for our middle rotation," Bristow said.
"Obviously is it a massive loss having Jeddy out but someone like Fenn will step straight into his role and do a great job."
Another new face, Tevita Aroha-Tuinauvai, is also unavailable after scoring a double in his first game for the club last week.
However the Blues will welcome Brayden Draber (hamstring) and Connor Massen (head knock) back into the back line.
Both missed the win over Kangaroos.
Tumut are out to keep their place in the top four and Bristow is looking to see the team convert their chances better
"We know we will be in for a tough encounter," he said.
"One of the areas we were lacking on last week was taking our opportunities.
"I think we managed to build pressure well but just didn't capitalise on the back of our opportunities.
"It is the main thing we will be looking to improve on and we won't be concentrating on Young too much.
"We know they will be tough but will be just looking to do everything right."