I don't know the engine codes for the carburated 1st and 2nd gens, but here's a quick list of the USDM Prelude engines:

79-82 : 1.8 CVCC 3bbl downdraft carb 72hp
83-87 Base (sometimes called DX) : 1.8 dual sidedraft carb 100hp
86-87 2.0Si : A20A SOHC 12v 110hp
88-90 2.0S : B20A3 SOHC 12v dual sidedraft carb 105hp
88-91 2.0Si : B20A5 DOHC 16v 135hp
90-91 Si : B21A1 DOHC 16v 140hp
92-96 S : F22A SOHC 135hp
92-96 Si : H23A1 DOHC 16v 160hp
93-96 VTEC : H22A1 DOHC 190hp
97-01 ALL : H22A4 DOHC 190-200hp