Of course, the Napier Sabre engine did not require a Fw-190-like nose (and the annular cooler would have made the ventral radiator removed).
This Sabre engine was also featured on the Hawker Typhoon, and the ugly nose radiator (of the Typhoon) could be replaced by the ventral one (of the Mustang).
At last we get Mustangs looking like the Merlin ones but with a more central propeller axis, a shorter nose, cleaner too (in my dreams, without practical need for extra air intakes):
In my book Virtual Mustangs is a full page about the Griffon-Mustangs (page 14), including the Red Baron, and there is also a CA-15 derivative (page 65).
This book is completely free to download (and homeprint) at
What other engine would you suggest?