Heat Treat Outdrives with Carbon Monoxide Torch? HELP!

[Muggydude]

Ok, so I want to harden my new diff outdrives for my Blitz. The mthod I will be using is heat them up till they are bright orange, then cool with water and repeat once. I don't have a torch, but my neighbor does. However, it's a Carbon Monoxide torch (MAPP GAS). Does this matter, or should I only use a butane or propane torch? Or will it work anyways?