'70 K20 carb options

[jopaul]

I bought a decent '70 K20 a few weeks back, and love it!
I think it's been lifted 4", but not really sure.
It starts and runs great when the temp outside is 60 or so, warmer and the truck runs like crap, sounds like it's going to stall.

I do not know anything about carbs except that they feed the engine the golden liquid and make it go vroom. Ok, I exaggerate....a bit.
The carb is a Holley 2 barrel, not sure of much more than that at the moment.

My question(s) are:

1) I want EFI but keep things simple. I have been looking at this https://www.holley.com/brands/holley...per_2300_2bbl/
Would that fit with the same intake manifold I have (Holley is all it says on it)?
2) Has anyone swapped out a carb for one of these and does it help with the weird running during warmer temps?
3) Is there another option for EFI and keeping it simple?

I do not know much about the engine either, like I said I just purchased it and want to use it as a daily. I came here to learn more about my truck, :-D . So first thing to fix is how it runs.

Thanks in advance for any and all helpful info.