William Green's "Warplanes of the Second World War: Fighters Vol. 1" gives the following specs for the C.714:
Engine- 450 hp Renault 12Rol
Max speed- 302.5 mph @ 13,120 ft.
Climb to 13,120 ft- 6.5 mins.
Service ceiling 29,55 ft.
Range- 599 miles @ 199 mph.
Weights- empty 3,086 lb.
loaded 3,858 lb.
Dimensions- span 29 ft 5 in.
length 27 ft 11.75 in.
height 9 ft 5 in.
wing area 134.549 sq ft.
Armament- four 7.5mm MAC 1934 M39 machine guns, no mention of rpg.
For C.760:
Engine- 730 hp Isotta-Fraschini Delta R.C.40 12 cylinder.
Max speed- 285 mph @ sea level.
354 mph @16,400 ft.
Initial climb rate- 2,600 ft/min.
Climb to 13,120 ft- 5 mins.
Service ceiling-33,800 ft.
Endurance- 3 hrs 10 mins @ 298 mph @13,120 ft.
1 hr 30 mins @ 95% power.
Weights- empty 3,179 lb.
normal loaded 4.092 lb.
Dimensions- span 29 ft 5.125 in.
length 29 ft 2 in.
height 9 ft 6.125 in.
wing area 134.549 sq ft.
Armement- six 7.5mm MAC 1934 M39 machine guns with 300 rpg,later to be increased to 1000, 1200 and finally 1500 rpg.
Fuel capacity: one 86 Imp. Gal. fuel tank between engine and cockpit.
It isn't much info, but better than nothing I suppose.