Im lookng to build an M8 engine. I want to start with a donor engine. Whats out there and which model engines will fit in new roadglide/touring frame?

 

I have a 2017 M8 liquid cooled from my limited that I will most likely be selling. The oil pump failed and the motor is junk. I am trying to find an M8 to swap out. I am doing research on a rebuild or buy a crate motor.