My solution was to pick up a piece of 1/8" flat iron that was about 1" wide and then cut it to 2" long. I used a 16 Oz precision insertion device
and inserted it into the grove. Stuck a crescent on that and they turned out just fine. I had teflon'd them when I put them into the intake ~4 years ago so no heat required this time around. I used the same little flat iron to install them into the new intake, though the bypass nipple is hard to install with less than 180 degrees of turn that you can get on it. I cheated and stuffed a crescent in on the end of the flat iron pointing out from the nipple, then put a second crescent on the jaws of that guy so that I could turn it that exta 30 degrees to get a bite directly on the flat iron again. I'm contemplating next time just cutting a slot in a junk 1/2" socket with a cutoff wheel then welding the flat iron in place. A sufficiently big socket would wrap around the pipe or a sufficiently small socket would fit inside and not interfere and prevent the thing from slidding out of the slots and busting my knuckles so badly when it lets go from pushing at the wrong angles.
Once out, I cleaned them up and they looked great for having been through 3 previous intakes and 30 years of living in coolant.
Greg