It was on a 92 Park Ave. Ultra (only 67k original miles).
I got instructions here first, I removed the fuel rail to take it to the bench and replace o-rings assumed he would want to do the same. I also didn't want to test the flexability of the 15 year old plastic hoses.
I assumed that they used a mixture of metric and SAE like an older Monte Carlo I had worked on, so when the metric wrench slipped I switched to an SAE and it fit nice and tight. Sorry wasn't trying to spread false info, just what worked for me.
By your description, it sounds like a 91-95 as opposed to 96+.
He is talking about a 93 isn't he?