That last pic in particular shows the frame mod I have been trying to explain, under the rear of the tank and on top of the frame loop. Difficult to visualise what and why it is, it may make sense when you look under the tank.
At o1racing03: this is what I meant by you being brave, this is a Norton site, so by definition your bike is bound to attract more negativity than an immaculately restored, bog standard, shiny Norton that looks exactly the same as all the others! You simply need to filter these comments out and ignore them!
Here's my 2 cents: selling off all the parts suggested by others will net you about $0 ! The engine will get you a few $ though. Reverting the frame back to stock will likely cost more than you could buy another one for. Then buying all the stuff to revert to standard, well, you'll probably have to sell everything else you inherited from your brother, and more, to finance it! Then you'll have a bike with zero sentimental value that looks like all the others. But where's the fun in that!?!
I think your bike has the potential to be a real fun, outrageous, different, cool, characterful bike. I think its gonna be great in its own right, and a great tribute to your brother too.
Ref your cafe racer comments though, this bike IS a cafe racer. If you want a street bike just to go fast, with zero interest in style, being different, being old skool, etc... You should just buy a few yers old R1 for next to nothing!
But where's the fun in that !?!
I for one, hope you see this project through, and keep us posted along the way!