Huh
A Lehner 1950 in a Revo is perfectly fine. People put Neu 1515s in Revos, apparently with good results.
Even just 3 or 4 years ago a 1950 in a MT was The Shit, and they are still great motors.
Those who have or had one know what I'm talking about.
Sure, a 1950/8 on 6S is a lot of motor. Don't expect the stock traxxas drivetrain to hold up for long.