B16A and B16A1 is from a JDM Crx Sir--it's OBDO, you don't want that.
B16A2 is from a 99-00 USDM Civic Si--it's OBD2, you don't wan that.
You want a B16A3 (rare!) or a JDM B16A Sir II from a 5g Civic.
The Y80 tranny makes me think it was from a B16A Sir--OBD0.