This video covers all the things that get removed along with the petrol/diesel engine but still need to be replaced with electric versions when converting a car to electric. These include:

Heating
Air conditioning
12v battery charging
Brake assist
Power steering

https://www.electricclassiccars.com
https://www.instagram.com/electricclassiccars
https://www.facebook.com/electricclassiccars
https://twitter.com/elecclassiccars