I'm doing what your talking about to a Super Tigre .90 or a .61. Haven't decided yet which engine I'm putting in the plane (Hangar 9's Fokker D7). The ignition cost me about $120 with two sparkplugs from CH. My biggest complaint about glow is the unreliable igntion. Too many deadsticks from crappy glow plugs that cost $8 to $12 nowadays. The glow plug system is really a bad design when it comes to ignition timing. Get a cheap ST 2300, OS 1.60 FX, etc and put a spark ignition on it. I'll let you know how mine works out this spring.