Get em! That's a deal even if they are un matched. Manufacturing technology has improved so much over the past 20 years that I wouldn't be worried about flow matched units until you start tuning on the edge.
I've used these happily with up to 75% E85 and that was also while fighting a fuel pressure issue! Got it all fixed now, and Im going to experiment with straight E85 these next few weeks. These are a small injector for straight e85, but plenty to run up to a 50/50 mix.
Also I know this is going to show my age(or lack there of), but I started the car with the old chip and the new injectors and it sounded wicked to say the least. It had the cadence of a nitro methane engine without the deeper tones... only ran it for about 30 seconds though. You will definitely need a chip though and I highly recommend turbo tweak. I ordered my chip for 18lbs of boost on pump gas even though I run 16, this gives me plenty of room for using mild e85 mixes without having to retune when I go back to pump gas.
The only issue I have had since going to the 60s is that my highway MPG is a constant 16-17mpg. If you're going on a long trip and you are positive that you have enough self control to keep your foot out of the boost, you can turn the fuel pressure down for better mpg.
Overall the 60s are one of those mods that work so well, and are so trouble free that you forget that you have large injectors. My V8 friends freak when I tell them I have 60s haha, they get even goofier when I mention that I want 83s.