I have a used RCGF 26 cc engine that I was going to put on my new stearman. However it calls for the distance to the prop from firewall to be 6-1/4" which means I will have to cut a hole in the wall to accomodate the rear of the engine. The DLE 30 would be the perfect distance without cutting a hole. Which do you think would be the better bet? Does anyone have a DLE 30 out there on the stearman? Good size?

Thank