@Dano the ZO question has been pretty much answered. You talked about power plants such as is PCM the best motor for that boat? Correct Craft owns Nautique, Centurion and Supreme boat companies and PCM. So it would make sense to keep use PCM as their motor of choice to keepthe money with in the corporate roof.
Master Craft was all Indmar until it was sold to Penske many years ago and the motor was changed to Illmor. MC was then sold to I believe its current owner and the contract stated that Illmor was going to be the required motor.
Malibu is doing their own motors as of this year I believe but in prior years they used raptors 6.2.
The coordinations are going to keep as much under their control as possible meaning that they will use the motor that best fits their cost and if they can keep it with in there cooperate umbrella the better. So in their eyes the motor MFG they own is going to go into their production. Which is the best fit for the product.