Owww that will be a tight squeeze. Just measure the inside of my Seafury cowl and its 23.1mm which is .1mm bigger than the dia of the Evolution ... Would definitely be nice though if you could get it in. Re cooling.. make the side cowl flaps functional rather than just for show or you could be clever and create ducts that run through the FW to where the full size had vents just aft of where the exhaust outlets are... Can be seen on this pic.
