According to scalemates, the kit is dated around 1990, 1991. They should be good. I’ve had decals from the 70s and they went on with no problems. As long as they’re either in separate bag or between the pages/folds of the instruction guide, I don’t foresee you having issues.
The only time I’d be wary or worried if the decal sheet is yellowed and the decals itself have clear border being yellow/brown.
“Who controls the skies, controls the fate of this Earth”
Author unknown- 352nd Fighter Group, Blue-Nosed Bastards of Bodney
“Send one plane it’s a sortie; send two planes it’s a flight; send four planes it’s a test of airpower. - Richard Kohn
Monogram decals hold up pretty well is the kit was stored reasonably well …
Big Joe: 'You just keep those Tigers busy and we'll take care of the rest.'
Oddball: 'The only way I got to keep them Tigers busy is to let them shoot holes in me...'
Man, I have that exact same kit in my stash! I'm looking forward to seeing that built!
Mike, I've used some really old Monogram decals (30+ years) to good effect but I first brushed them with liquid decal film. When that dried, I put an electric hot-plate on my worktable with a small pan of water that I kept just below a simmer. I gave them a good soak in that hot water and even then, they required a lot of time on a paper towel, with repeated brushings of the hot H2O. But they held up and went down without drama!