The A-31 Vengeance had an air-cooled radial Wright Double Row Cyclone GR-2600-A5B-5 engine that gave 1,600 hp engine. The plane carried 1,500 lbs in an internal bomb bay and external rack.They saw battle in the Second Arakan Campaign. They had 4 .30 cals in the front and 1 .30 in the back. The top speed was 275 mph and cruised at 235 mph. The range was 1,400 mi.The wingspan is 48 ft. It weighed 9,725 lbs empty.
Bombs:
2 internal 500 lb bombs
2 externally fitted 250 lb bombs
From: Wikipedia.