If he is "making the transition" then he most likely has all the basic building tools. I think he wants to know what he will need, in addition to his current inventory, to move up into gasoline power. But, as opjose said, often we just don't know if they mean glow power or gasoline power... many refer to glow as 'gas' powered. He might be wanting to move from electric to glow, but we don't have the particulars.

CGr.