mgahealy, I am very interested in knowing how you FPE 2.4 fits, and fly's the stearman. I too have one of these engines,(aren't they Great), and would like to use it in the stearman. From other posts on this thread we are warned that this is way to much engine for this bird.
I am also considering the Kange Waco and useing the 2.4 on it. The Waco is a little larger I belive and capable of 3D manuvers which could use the extra power.
I am still in the desicion makeing process and have not decided on which one to go with. ( I love bipes).
Please keep us posted on your progress and successes or problems with the FPE,

Thanks, Craig