I'm 6' 210 lbs. and sport size 13's so I agree the F6b riding popsition is cramped up for the big mile days. I love it for the shorter back road blasts though! I had a Vic bagger and it is the go to choice for larger people. The Honda is soooo much more refined of a machine than the Vic though! Good thing I still have an old Pan and a hot rod Confederate for kicks, because to my taste anyway, the Honda can be a little boring.
You'll never be able to stretch out on the F6B the way you can on your Vic. For bigger/taller guys the Vic can't be beat for comfort. Mustang seat and Helibars are probably the two best additions for allowing more room. Highway pegs, like the Rivco Aero, will help too.