Can anyone tell me if it is possible to convert an Alpha I standard rotation outdrive to counter rotation?.I have twin Chevy 350's in a 23 foot formula. Both engines are standard rotation (Steers hard to the left.) Do I need a counter rotating outdrive? Or can I reverse the shift cable on the left engine and put a LH prop on it or change the lower unit or something? (Do't want to purchase awhole new outdrive)