I'd say that's a definite...maybe(?).
I do believe that the blade spacing on most modern forks are significantly wider than the vintage stuff, so the axles might come up short. Also...metric vs SAE? How 'vintage' are we talking?
When it comes to bearings, there are only five common sizes for the balls themselves, but many sizes and styles of cage. You might have to forego cages entirely and simply use loose bearings, but that is do-able provided they fit the cups & cones you've selected. That just presents another opportunity for a mismatch.
I know that's a nebulous answer, but it's kind of a case-by-case situation--sometimes, it just might work out. Take careful measurements before you commit.