You can make it fit Grumpy,
I'm 6'5" 400 lb, 36" inseam and was able to make the F6B fit me quite well. First was the Russel Day Long saddle(up 3" back 4") then once my sweet ass was feeling perfect I installed a 16" Klock Works Flair shield that I drilled new mounting holes to raise it another 1". Now that I had my head and ass feeling good I installed HeliBars to get my hands, arms and shoulders in the most comfortable position, thus stopping all shoulder and neck pain. Next was to take care of my foot issues (size 16 boot). I put on the 3/4" dropped floor board mounts from Kuryakyn with different pegs.
After all that my F6B fits me like a glove and with the Ego lll pegs I can stretch out when the need arises.
Note: Those are not all my F6B mods, only the ones I did for pure comfort.