This is the center frame used for the Phoenix, Classic, and Vikking 146cm.  Engine mounts are specific to the engine so please specifiy the engine you intend to use.
 
Options Include the Vittorazi Atom 80 and moster 185, Polini, and Minari F1, Corsair Black Devil and Black Bee, and the AirConception Nitro 200 and Tornado 280.