RE: MOKI 210
The gas heads will probably bolt onto the glow crankcase. I do not like to take apart my engines to check and make sure. Compression ratio will certainly be lower though, which causes glow plug selection problems unless you use extra nitro methane to compensate.
You also would need to use M10 to 1/4" plug thread reduction parts to cater for the glow plugs. I have these available, made by RCexl.