This is quick and dirty from memory, since I'm at work, but....
Its almost 50mph faster than our fastest bomber (B26 = 280ish Ki67 = 334mph), has a light bomb load, but should have good defensive guns (20mm & 12.7mm MG) and be quite manueverable. It should also be fairly durable, since the Japanese had learned the importance of armor and self sealing tanks by this point.