They were supposedly pulled sometime in the 90's and replaced with larger ones. The seller claimed they had only a few thousand miles on them and had been in storage since. They arrived very clean and all ohm'd out perfectly. I've been using them for 4 years at 15 pounds of boost with no problems, yet.
You need to know what each injector ohms out at, and make a decision from there. I don't think its that risky if they pass that. I did it because I got all six for $150 and I had two failed and not enough money to purchase new or aftermarket injectors. I don't regret it a bit.
