http://www.bohhicaracing.com/for_sale/index.html
If you are unaware of river racing you should check it out. The 21' tunnel on this for sale page will do 100+.
If you are looking for 1000+ HP out of a naturally aspirated motor, there is one for sale also on this web page.
Contact ryan@bohhicaracing.com with any serious inquiries.
Thanks
441 SBC built by Tim Harding - With a small block wound way out!!! I would bet against that!