ORIGINAL: stevenmax50

Is there anywhere I can find a gas to glow conversion chart? I am building the TF 1/7 P-51. The kit calls for 60- 90 2 stroke or 90-1.20 4 stroke. Being a bigger is better kinda guy I had planned on the 1.20 4 stroke. But I am wondering about installing a gasser instead. Specifically, the DLE 20cc. But is that not enough? Should I consider the 30cc? Or is it in fact too much for that model? A gas/glow conversion chart would be helpful.