Was this a real R/T to begin with?
Also please explain how it "improved" driveability and reliability? I got the exact same car as you, but with its stock 440 and i think it is very drivable and reliable. No need to swap anything for these reasons.
I'm reading this argument of more reliability and driveability over and over again, but i really dont know why those modern engines should be better in this regard?
I can drive my stock 440 charger anywhere and its not hard, difficult or unreliable in any way actually.
That said i dont have a problem putting in a chevy engine in a chrysler car.
But i would have gone ZZ572 if i did.
How did you mated the LS engine to the mopar transmission?