Umm. Depends. The Flight Streak was originally meant to be flown with a combat .35 engine that is more powerfull than your LA .40. It is supposed to be nose heavy with such an engine with lots of elevator through. Just don't expect it to be a slow stunter! Should be a blast to fly with an LA .40!

My first Flight Streak had a Testors black head .35 with out a muffler. Flight Streak was a proper name for this combo!