Well they did my big bore crossover a few months ago. It should be exactly the same as yours.
If I remember correctly, my mechanic finally cut about one inch off the end of the header pipe to make the whole combo fit to the bike.
Since I knew my order was different from their regular product line, i filed any difficulties under "my stuff has always been and always will be a pain for the mechanics, that's business as usual".
Now I'm using circumcised headers, which means longer and safer pleasure...