I was playing around with the design. The box enclosing the motor is not only almost twice as large as the Vulcan design but almost twice as long. I moved the radiator all the way forward until it cleared the Styrene motor enclosure and then lengthened the hood.
I looked as this for a bit .. and then had an Epiphany. Tool Boxes. The squarish shapes exiting both sides of the hood could be Tool Boxes, Storage Boxes .. whatever.
It was somewhere about this time .. with the mechanism in place .. I could cut out slots in the frame for the bearing blocks too.