I have a large 2009 5 spot and recently went from a fox 32 140 to a fox 36 160 which is 545 a-c which is about 20mm higher than the 32 and reduces the head angle by about a degree.
Loving the change, and can recommend, although was a brilliant bike beforehand 🙂
Not sure I would bother with the headset change as I found it cheaper to sell 32’s and buy the 36’s.
I would get the frame in the knowledge you have options 🙂