Which engine did you swap to and why?

[Nitis]

As stated in my newbie thread I recently got a 72 k10. The tranny is brand new not sure if it's a turbo 350 or 400. But the engine is tired.

I don't need to go fast just want something reliable. My first thought was a tbi 5.7 as we have some history with those engines and how they work. But finding a god low mileage donor is next to impossible these days

I like the idea of the 6.0 motors as there are probably tons of them available but how much more complicated are they to swap? Also I don't want to go back to 8mpg. I know I'm not building a commuter but I want to be able to afford to drive it somewhere. And we all know the 6.0 engines are power houses but they are thirsty too.

I'm open to suggestion. I would love to do a cummins swap but this isn't the right truck for that plus dad said no not on this truck.