Think of the letter J and you pretty much have it. Roughly the same radius as the seal and somewhere more than 90 but less than 180 degrees of coverage. Long enough to have the needed reach (14-18 inches?)plus a bend at the end (2 inches?) to allow you to apply the torque needed. When you are freezing to death it is hard to make these tools (grin). I have no idea what became of the gasket tack I purchased or I would share the information. It was just a gamble that it might help, maybe it did or maybe it didn't. It would have been nice to clean the area with solvent but I didn't- I think at that point I was trying to remember my name and not slur my speech.....

You are correct about there not being much space in there but I found that there was enough.

Randy