Hello Shaun, Yes I did not build my Stearman, traded it for a T-28 I had, but the guy I got it from had a G-62 in it, I put the 7-77 in it, but had to make a plywood plate for the engine mount, added to the original firewall, the power your asking about is ok, I would say perfect for scale flying, but the airplane is covered with fabric, and is painted with Imeron paint, plus the guy that built it used a lot of plywood, so is heavier than normal, but still fly's very nice, any other help I can give let me know thanks! Oh and the fuel I use is 8% oil and 5% nitro, was making my own, but know using Riches Brew, out of Texas, good fuel especially made for these engines.