Lets check a Yank twin recep engine pusher prop plane of the same type, vintage and power.
Me 329 Span 57' 6" Length 25' 4" Empty Weight 15,322 lbs
XB-42 Span 70' 7" Length 53' 10" Empty Weight 14,000 lbs
Speed
Me 329 426 mph (or 492 mph, not with that power)
XB-42 410 mph at 23,500 ft
In December 1945 the XB-42 flew from Long Beach, California, to Bolling Field, District of Columbia with an average speed of 433.6 mph. This would include the assist from the "jet-stream".
Service Ceiling
Me 329 41,010 ft.
XB-42 29,400 ft.
Range
ME 329 1,566 miles
XB-42 1,840 miles; 5400 miles maximum ferry range
Bomb load
Me 329 5,291 lbs
XB-42 8,000 lbs*
*For special missions, the bomb bay doors could remain cracked open 6 inches to enclose a single 10,000 lb. bomb.
Defensive armament
Me 329 one 20mm cannon, remote aimed
XB-42 four .50 mgs, remote aimed
Fixed armament
Me 329 six 20mm cannon
XB-42 two .50 mgs
Oh yeh
First flight
Me 329 never
XB-42 6 May 1944