I just picked one of these up on e-bay, quite a nice looking plane, I agree with you on the engine size,
can't see anything larger than a 46 in this one, anything more powerful is asking for trouble, don't think
the airframe could handle it. My thoughts are to use a GMS 40 in mine, I think it will be enough power for
the light airframe.

Are you going to box in the engine mount pedestal and put thin sheet on the firewall to keep fuel out of the
interior of the plane? I think I might also add a little more bracing to the landing gear plate as I fly off of a
grass strip.

Bill D.