Aye guys just need some help on a few questions I got , lemme tell you what I got

I have a 1991 Acura integra 4 door ls
Right now it is bone stock under the hood , my plan is to strip the entire thing down and build it from scratch now I know what to do for interior and exterior I just don't know what to do under the hood..

I have a b18a1 in it at the moment , with a auto transmission

I wanna put a 5 speed tranny in forsure

Now I got a guy giving me a h22a1 motor with 5 speed tranny for 600 bucks and wanna know what will I have to do to make that swap work in my DA??

Also the other option is I could just rebuild that engine and get a b18 5 speed tranny and swap that so what do I need to do for that?

I don't mind the work , and I enjoy it

Just need some help and advice guys so please help