Doesnt look worth that sort of money to me, as said above its just a butchered standard manifold (although looks well done) rods sound like they are standard ones just cleaned up not even "proper" ones.

I just cant see anyone paying that for an "unknown" engine, i doubt you would have to pay much more than that for someone like Stu to build on specifically for you.

Definately worth a lot of cash to the right person, but not that much as far as i can see.