_http://www.angelfire.com/ca4/CorvAIRCRAFT/EngineID.htm#case_ (http://www.angelfire.com/ca4/CorvAIRCRAFT/EngineID.htm#case) only thing i see wrong with this info is that late cylinders WILL fit in the case , but the head has to be modified , opening is too small. regards, tim colson done it many times!