Ideas on power choice
Brushless set up. MPJet 25/35/20, 8cell HR1700AUPs, 11x7e prop up to 12x6e
AUW of FW190 warbird, HL scorpio kit 27oz. Flights are very spirited climbs at 50 degrees+, times are over 9 minutes with more for security. Motor not even warm batts cool. Most cruising done at about 1/4 throttle. This will fly a cub very scale like even if you come in at 30 oz.
Another alternative is to go with a Mega 16/15/5 or 4 geared 2 and 2.5:1 10x7 to 11x7 prop. 8 cell Kan 950 deliver up to 20 Amps comfortaby and should have no problems hauling a Cub around, even if your over 30oz. These motors will deliver 150 watts no problem. 4 turn can delier over 200 with larger cells or go to a 10 pack.
Hope this helps