Before I bought my 27 Shadow last year, I checked with Ilmor on the pricing of each package. This is what they Bob Mason their sales manager provided me.
Engine/Drive/Transom - 550 $ 46,780.00
625 50,800.00
Please consult your boat builder as the list price of power normally is a point of flux when they quote a boat.
Being a year old, this might have changed but it gives a pretty good idea of what they run.
Good luck!
I don't understand why these (all boat motors) are so expensive. A friend of mine has a self sposored top fuel funny car. When he grenades a motor, it's a 25k bill. 3000+ horsepower, or somewhere around there and it's half the cost. What's with 50k for 625 hp???