Are you having problems/issues with any of the above?
Or are you just wary of the mileage, based on past experiences with other vehicles?
While it's possible that those could be future failures, there are countless numbers of HDs on the road still with 500k-1M+ miles, still running on the OE parts. And, the way history is playing out, your 3rd gen LBZ may go down in GM history as the best that was ever built.
But in your situation, I would feel comfortable with a $3-$5k nest egg set aside explicitly for a major event, that may or may not come to fruition.
No input on labor hours, but here's some part$ $ numbers for a few;
Stock Garrett drop-in Turbo, $1300. If it did fail, I would also consider updating the up/down pipes since you're in there.
A set of Pro-Fab (the best) up/down pipes, $500.
Injectors do wear, but nowhere near the failure rate of the 1st gen motors.
And on an LBZ, you usually just replace the single one with problems.
Those are $350-$375 ea, depending on reman or new.
$2700-$2900 for a set of 8, depending on reman or new.
Trans; on stock tuning and proper maintenance, meh.
You might run into a scorched TC, an upgrade to the stronger LML, $500-ish.
A genuine Allison ReTrans 1000, $3k-ish. ($900) TC included.
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"