Ask your freind what is the total btu capacity of a corolla, then ask what is the superheat control of its txv and finally whats the compressor displacement.
It will become clear to you and him both.
Also ask him to install this same unit into a hiace with triple units and see how it runs.
And just for kicks, as you want to get into the gritty parts, if im swapping s compressor for gas leak failure in its casing, how much oil should I add to new compressor if its completely empty on removal.
If you can answer the last piece in correct explanation, ill tell you why your komressor swap is a bad idea,