Hi evwribody, thank you for commenting.
The engine fits, because it was very basic and lacking any detail of the cylinders' heads so being smaller then the cowling: I added small (but slightly overscaled) disks to simulate the ball bearings, most prominent thing visible through the cowling openings and will add spak plugs cables and injection ducts made with copper microtube.
The silver/crimson aeroplane will be Arturo Resch's HD1, both liveries are taken from Osprey's "Italian aces of WW1".
Ciao
Giuseppe