Actually you do need that info. Not for the power but for the weight. When doing small gas engines, say 26cc to 75cc, total engine weight is everything. On glow engines the mounts are often fiberglass which may weigh only an ounce, but even the best gas rail type engine mounts go easily get to 4 ounces since they must be quite strong to handle the torque. Weight for gas engines in the range I mention are most definitely something to consider

Glo engines, both 2 and 4 strokes do not make the kind of torque that a gas engine does. Stick fiberglass mounts on a gas engine and it will not be long until you twist them to the point of cracking them. Besides the vibration differences alone would weaken glow mounts