I can deliver a good 600h.p. motor for under $20K. I have been teaming up with Shaver Engineering up in Torrance to put together a marine package. Right now I am the only one that can get their marine motors. I have been more than impressed with what I have seen & tested! Shaver is known for their sprint car motors, indy car motors, etc... If you go and search the Internet for Shaver Engineering or Ron Shaver, I am sure that you will be impressed.
The motor is a 509cid engine and Shaver is offering a 1 year 100 hour warranty on the motor. A 2nd year extra 100 hour warranty is available for an extra $1K. I can come in just under $20K for the motor (EFI) without headers, but with everything else ready to drop in the boat.
Here are a couple of pictures of the one that I put in our red boat. This model is has a carb, but EFI is not a problem.
http://www.***boat.com/forums/attach...1&d=1195056489
http://www.***boat.com/forums/attach...1&d=1195056489