I am running the Evolution 58gx in my 27% BME Oracle Pitts

and am VERY happy with it. The Pitts weighs 19# and has unlimited vert swinging a 24x8 (7000rpm) and 24x10 (6800rpm) on 30:1 break-in mix running rich enough to coat the landing gear and left wing. I'll let you know how things go once I start leaning it a bit.
[link=http://scooterscum.com/gallery/albums/album35/e100_5193.jpg]

[/link]