Well I stopped by Home Depot to look for the nut. But all I could find was 1/2" and 3/4". No 5/8". So I bought the 3/4" hoping maybe it would fit. Otherwise I guess I'll go to Lowe's or something. I'm gonna see if it fits tomorrow morning.
Tim, good to hear your car is running cool. I WISH mine would stay on the O. I usually sit around 195 or so, which ain't bad, but when it comes to aggressive driving, the temps usually climb up a little.
Andy, one of these days I'll be getting a fluidyne, but first I need a wideband (ordering one tomorrow or monday) and a fuel pump.
Scott, I tried Ace Hardware, and they didn't have anything that big. The poor guy even came out and looked at the EGR bung and burned his hand on the inner fender leaning over to look at it, lol. Poor guy.