It is surely a rear prop pusher. Look at the prop angle and trailing edge. The exhuast stacks also point to the prop.
The Japanese were working on a pusher, the Shinden.
Or the D0-335 as MarkVZ said.
Wish I knew. I don't have much for referance books.
------------------
Wing up, Get kills, Be happy 
 Midnight CO412th FG "Braunco Mustangs"
Midnight CO412th FG "Braunco Mustangs"[/i]
The 412th is actively seeking P-51 Mustang pilots. E-mail me for more information      
davidlj@charter.net