Sure,.. why not?... ...

Will I run in any trouble where the bcb kit mounts to the tank supports and the peanut tank attaches to the same spot I'm talking the  rear mount?

I know you have to cut the top motor mount supports and the stock front tank mounts and seeing how there's no speedometer gonna have to buy a mini speedometer and side mount for that and possibly a new speedometer cable and new fuel petcock to fit the new tank

Or would it just be easier to use the Ryca hing seat and there seat and not use bcb seat mount and just use the bcb fender bracket to mount the fender?