Transmission questions...

[sps21112]

Hey guys looking to do a 5th gear swap and had a question. Do i need the gear on the output shaft only or do i need the input and output shaft?

 

[sps21112]

Well what im wanting to do is put a gsr 5th gear in my b16 trans. So what parts do i need? and i know alot of people are going to say ls 5th but i dont like the ls 5th.