I don't have any gas engines in my planes yet, but here's a couple of facts that would lead me to believe you could use that in the Twist 150:

Horizon recommends the Evo 26 GT2, which is a 26cc gas engine. The specs on the SPE26 say <10lbs for 3D flight, and Horizon says the Twist 150 should come in at 8.5-9.5 lbs.