The legs on my metal stove are 11inches long, one inch diameter and about 12ga thick, at 11 inches away from the lets get warm but probably less than 100 degrees, nicely warm not hot at all.
I guess you could drill a few holes in the legs for ventilation, but the best idea would be to fill up the stove and burn it to see how hot the legs become after an hour or two.
Since mine sits 6 inches from an non-heat resistant insulated wall I put 1 inch of air insulation and 1 inch of rock wool insulation, It sits 12inches above the base and 18in from the ceiling, I also added the same inch of air and rock wool insulation on all sides. The walls and floor dont get hot at all, it is the ceiling that gets hot- really hot.
my bus thread, http://www.skoolie.net/forums/showthread.php?t=8860&highlight=bubb