any B-series transmission will bolt to any b-series engine with no problems(aside from the old prelude B20 tranny and the crv tranny). He wont be able to use his stock transmission. So that means any integra, del slo vtec, or civic si transmission can be used. Like I said tho, the 1st gen B16 tranny is cable actuated, which might simplify things a little, since his stock crx tranny is also cable.