Elite 150 carb/motor swap

[Old Dad]

I was wondering how much of a difference that putting a 28mm carb in the elite would make. Also, what else do I need to swap out for the carb swap?

I also read that the elite 250 motor wasn't a huge deal to swap onto the 150. Any suggestions? I am not very advanced but I do know how to work around mechanical things.

Any other simple mods?