Hi, I don't know a heck of a lot about clutch kits...
I have an 89 Si transmission, clutch was slipping last time it drove.
The clutch parts in my 89 DX tranny are all good.
What parts are interchangeable between the two?

Is it even worth me doing this swap, since my car is just going to be a daily driver + I drive highways a lot?

 

the clutch itself will swap out. if you commute, the dx trans will give more mpg cause of the final drive.

 

Okay cool.
I didn't notice my epic spelling mistake in the title, was in a rush. I will probably just stick with the DX tranny, sell my Si one to a local or something. Haha. Thanks!