I'd still like to see the Ki-44-IIb, with the gun options for the IIc so you could choose an anti-bomber armament or an anti-fighter armament.
Ki-44-Ia:
Wingspan, 31 ft. 1/16 in.;
length, 28 ft. 8 ½ in.;
height, 10 ft. 8 in.;
wing area, 161.458 sq. ft.;
empty weight, 4,286 lb.;
loaded weight, 5,622 lb.;
maximum weight, 6,363 lb.;
wing loading, 34.8 lb./sq. ft.;
power loading, 4.4 lb./hp;
maximum speed, 360 mph at 12,140 ft.;
cruising speed, 249 mph at 13,125 ft.;
climb to 16,405 ft., 5 min. 54 sec.;
service ceiling, 35,500 ft.;
normal range, 575 miles;
maximum range, 1,070 miles.
Ki-44-IIb:
Wingspan, 31 ft. 1/16 in.;
length, 28 ft. 9 7/8 in.;
height, 10 ft. 8 in.;
wing area, 161.458 sq. ft.;
empty weight, 4,643 lb.;
loaded weight, 6,094 lb.;
maximum weight, 6,598 lb.;
wing loading, 37.7 lb./sq. ft.;
power loading, 4 lb./hp;
maximum speed, 376 mph at 17,060 ft.;
cruising speed, 249 mph at 13,125 ft.;
climb to 16,405 ft, 4 min. 17 sec.;
service ceiling, 36,745 ft.;
normal range, 805 miles;
maximum range, 1,056 miles.