Electric Windows, Manuel and Ari con

[EB Pete]

hey guys

well my brother drives around a 87 AS telstar sedan, and we were looking at making it a bit luxious. we had the idea to put electric windows and Air con and manuel in it. Just wanting a little bit of advice on this

1) Is it hard to put electric windows in this car?
2) What sort of manuel came in them?
3) What sort of air con should we use

Any help would be great

Cheers