For what it's worth, I built a 110" B-24 a couple years ago. It has the long narrow, high aspect, wing like a Connie. It weighed about 21#, if I remember correctly, and with 4 Mag .40 XLs, had tons of power. Would fly well on 3 engines, but could not sustain altitude on 2 (R.I.P.) [&o].
A friend flys a Don Smith Connie with 4 Mag .91 four strokes at 40+ lbs. you can see some vids here: http://www.youtube.com/watch?v=_laB8yq8WGo