I HAVE A 1989 115 HP OMC SEA DRIVE ON A 20 FT. PROLINE CC, IT RUNS GOOD BUT THE STEERING ARM IS QUITE RUSTY...IF I WANTED TO SWAP MOTORS...IS THERE ANOTHER ONE THAT WILL MOUNT UP TO THIS BRACKET OR WILL I HAVE TO CHANGE IT AS WELL. IF SO, WHAT COMBO(BRACKET AND MOTOR) WOULD WORK BEST. ALSO, IS...