i am doing a zc swap in my 91 civic hb, and it is a dx. instead of buying another tranny i was gonna have mine re-built, and also i was wondering if si gearing would fit into my dx tranny( final drive). its just an idea i had, can it work? would it be worth it?

 

GO for an si tranny all together. Ive got a 90 si crx with a ZC and si tranny I love the gearing.