Hello Jay,
I'm late to the party, so I'm imagining you already sorted this out, but my stuffing box on my 36-2 took 3 rings of WESTERN PACIFIC TRADING PTFE Flax Shaft Packing – 1/4" x 2’ because that's what was readily available.
What you should NOT use from them is their GTU SHAFT PACKING WITH W.L. GORE FIBERS.
Why? Because the yard manager (been doing it for 40 years; Ventura Harbor Boat Yard in Ventura, CA--I had great experience there as they really like it if you do the work yourself, and will let you borrow tools for free, give you free instruction, etc.) when I did a haul-out in '22 after purchasing boat there said that the GRAPHITE (the "G" in "GTU") can, on rare occasions, cause galvanic corrosion with your shaft.
I did some research to assay what he said and found this which backed him up:
between Graphite Gaskets and Stainless Steel Flanges" which said that, yes, a case of galvanic corrosion between a stainless steel flange and a graphite gasket most likely occurred (the ss flange and graphite gasket seemed a clear corollary for ss shaft and graphite packing).
What I will use next time: WESTERN PACIFIC TRADING Tefpack Synthetic Shaft Packing - 1/4" x 2’ as teflon doesn't cause galvanic corrosion (you can actually use it between two different metals to prevent galvanic corrosion) and it is not prone to mildew since teflon's synthetic.
It just wasn't in the chandlery when I went to get the stuffing, and I didn't want to wait to order it.
Fairwinds,
Mick Haven
Nammu / Pearson 36-2 / 1985, Hull #51