I replaced any that looked even a little out of tollerance with ones I had on-hand. I told the new owner about the injector situation and that some may last a while while others may fail sooner or later. He didn't seem to care but at least i gave him a heads up about them.
I would save your money for your build and just find good ones from your parts car. That car hasn't had fuel in it for years so they may be fine for a while. You can also have free access to the ones in my spare NA engine if you'd like. Someday I'll turn that thing into a table or something.