Jim sent PayPal funds few days ago for idler pulley wasn't sure if I needed to add a note here. Thanks
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Jim,That's a toughie. Try all the usual culprits: penetrant, percussion, heat. Then try catching the edge w/ a chisel and tap-tapping in the unthread direction. Since there's already a hole in the center, try an easy-out.
For future reference, if the AI nozzle seems stuck in the head or looks really rusty, start by soaking with oil for a day, then remove air rail. If rail nut(s) won't come loose, then just shear the rusty tube off flush w/ the nut using a sharp chisel. once air rail is out of the way, rap on the top of the fitting with a hammer to shock it & break up the rust. use a 17mm 6point socket and flex-head ratchet to remove fitting. The flex head will allow breaking it loose with the handle held slightly down to put the tork all in line with rotating the fastener. As the handle is swiveled upward, more & more of the tork goes into breaking the fastener off sideways rather than turning the fastener.
Sam, it is in progress. FWIW it has previously been upgraded from the dinky 69 carb to a 70-72 carb, bonus!
Sam2, it goes in the mail today. thanks.