outer shape and center hole using a water jet. Most of the holes will be threaded M10 or M12 for either the transmission or motor side bolts. The central boss will be cut on a CNC mill. The near side cut is for the CV joint clearance. The plate will be placed onto the transmission, using a gauge it will be centered and doweled to the transmission. The spline adapter will be mounted to the motor spline and bolted down. The motor will then center on the large central boss and be bolted down.
The powertrain will then be placed into the car and aligned with the white plate pre-attached. The top angle iron will be pre-drilled and mounted to the motor mount. The alignment of the angle to the plate will be confirmed and marked. The two parts will be removed welded and bolted together.
The angles extent to the front of the car to allow for mounting the water pump. The total hanging mass should be within a few pounds of the original powertrain weight.