The original SE5a also had engines that mounted with the prop exiting the lower area
The correct position is slightly below centerline of cowl. The furaero is ridiculosly low, almost exiting the bottom edge. Here are all original SE5As: My German drawings of a captured SE confirm the placing.
BTW, from those drawings, I have computed your wing separation should be at exactly 10.4 inches. I'm just guessing they have it at what, 11 1/2 or 12?