I have a buddy looking for a pr 500hp blue motors in good running condition.

I have one 500 efi with headers. 30 hrs of brake in time on them.. Fresh water 509ci. balance and blue printed...15k

I have a friend that has a pair of carbed versions with less than 5 original hours - fresh water. $15k each obo. These are the real deal. He is not on this site and not in the need for cash. If he can't get something close, he will just order a boat with small hp to get the drivetrain and swam them.