you can use any b-series transmission.

that includes transmissions from the following...

91-00 integra GSR, RS, LS.
99-00 civic SI


this however does not include transmissions from:
any model CRV
or a 1991 and under Prelude.


all mounts, axles, etc should line up. The gear ratios are differant though, which could mean equal or better acceleration in your case.