18-20lb, 78" wings, 1650sq" area, 64" fuse, I do not have the engine in hand yet, The cowl I have yet to build, (scratch build plane)) The question was all I see of todays kits is engine box box box box, the plan I build from indicates q42 mounted directly to firewall NO BOX, to provide adequate airflow. I added some cowl baffling to my last build custom to the Saito 300 that powers it. I have to get the engine in my posession before I can proceed, been just going by engine photos thus far.
Just not sure if completely understand the importance of an engine box.