Hi, does anyone have a 1957 QD-18 parts catalog that I can download? I am selling parts from a 1955 QD-16 and I’ve received a question as to whether or not the powerhead from a QD-16 will fit on a 1957 QD-18. Any help that you can offer would be greatly appreciated as to a parts catalog or information as to whether it might fit. Thanks in advance for your help and have a great day. Tim Puckett