The 65LA will be dependable.... But it would never occur to me to run that engine on anything but a trainer (just my preference-) here is why: I always overpower my airplanes- it is just too easy to get "75-90" performance in a 60 case/weight! There is no downside since they are lighter than ever before... 60's are becoming the red-headed step child since 46-53 's are getting stronger and 75+ are about the same weight as the 60's yet have more disp. and power---

Say I have an airplane that "calls" for a 60 2 cy. engine, I look at the high-end 60's (Jett, Rossi, YS etc.) or I move up to a Tower-75 ($99-), Jett-90, ST-75 or G-90. Do you really want a warbird that is under-powered? (Consequently I would not fly a warbird with anything other than a 4 stroker, sounds too good and you need to swing bigger lumber on those birds---

Try a search for this airplane and see what folks are running and how they perform! While the OS-65LA is an OK engine (Think 60 sized trainers with Master Airscrew props. [X(]) I think the Saito-100 is one of the best options mentioned thus far, with a YS-1.10, YS-91, and Saito 91 close behind- (The 1.10 is the best and most powerful but is expensive at $335-)

Cheers!