sentences:  Engine options included a GM 454 cubic-inch 8-cylinder (7.4 L) Vortec mated to a GM 4L80E heavy duty truck transmission, or Cummins 6-cylinder 360 cubic-inch (5.9 L) diesel engine mated to an Allison heavy-duty truck transmission.MSV's utilized air suspension systems, and the vehicle sported gull-wing doors.In order to keep costs in line, Mauck designed his bus with many off-the-shelf parts sourced from GM, Ford and others.