Engine number guide 1976-86 240 series:
498304/5 B21F, 8.5:1 compression, EGR, 102 hp, 1976 49 state
498312/3 B21F, 8.5:1 compression, EGR, AIR, 102 hp 1976 California
498578/9 B21F, 8.5:1 compression, EGR, 104 hp, 1977-78 49 State/Canada
498580/1 B21F, 8.5:1 compression, Lambda, 101 hp, 1977-78 California
498776 B23E, 10.3:1 compression, no EGR or lambda, 140 hp, 1979-80 European
498778/9 B21F, 9.3:1 compression, EGR, 107 hp, 1979 49 State/Canada
498782/3 B21F, 8.5:1 compression, Lambda, 101 hp, 1979 California
498824/5 B21E, 9.3:1 compression, no EGR or lambda, 123 hp, 1979-80 European
498814/5 B21A, 9.3:1 compression, EGR, Pulsair, 100 hp, 1980 Cdn
498836/7 B21F, 9.3:1 compression, no EGR or lambda, 107 hp, 1980 Cdn
498848/9 B21F, 9.3:1 compression, Lambda-Sond, 107 hp, 1980 U.S.
498892/3 B21F, 9.3:1 compression, Lambda-Sond, Constant idle, Bosch ign, 107 hp, 1981 California
498896/7 B21F, 9.3:1 compression, Lambda, Constant Idle, Mopar ign, 99 hp 1981 MPG
498898 B21FT, 7.5:1 compression, Lambda, Turbo, 126 hp, 1981 U.S. Turbo
498900/1 B23E, 10.0:1 compression, EGR, Pulsair, 136 hp, 1981 Cdn and other markets
498914/5 B21A, 9.3:1 compression, EGR, Pulsair, 100 hp, 1981 Cdn
498922/3 B23E, 10:1 compression, Pulsair, 136 hp, 1981 Cdn GLT models
498920/1 B21F, 9.3:1 compression, Lambda-Sond, Bosch ign, AAV, 107 hp 1981 49 state
498960/1 B21F, 9.3:1 compression, Lambda-Sond, Mopar ign, Constant idle, 99 hp 1982 MPG
498962/3 B21F, 9.3:1 compression, Lambda, LH-Jet, Mopar ign, 105 hp 1982 California
498966/7 B21FT, 7.5:1 compression, Lambda-Sond, Turbo, 127 hp, 1982 U.S. Turbo
498978/9 B23E, 10.0:1 compression, EGR, Pulsair, 136 hp, 1982 Cdn and other markets
499800/1 B21FT, 7.5:1 compression, Lambda, Turbo, 127 hp, 1983 NA models
499802/3 B23F, 10.3:1 compression, LH-Jetronic version 2, 107 hp 1983 U.S. models (white cap)
499812/3 B23E, 10.3:1 compression, EGR, Pulsair, 115 hp, 1983 Cdn, 1984 other markets
499846/890/944 B23F, 9.5:1 compression, LH-Jetronic version 2, 111 hp, late 1983, all 1984 stick non-turbo 240's in NA - 944 has 3-wire O2 sensor
499847/945 B23F, 10.3:1 compression, LH-Jet 2.0, 114 hp, 1984 automatic non-turbo cars - 945 has 3-wire O2 sensor
499858/9 B230F, 9.8:1 compression, LH-Jet 2.2, 114 hp, 1985-86
499868/9 B21FT, 7.5:1 compression, Lambda, Turbo, 131 hp 1984 240T models in NA
499926/7 B21FT-IBS, 7.5:1 compression, Lambda, Turbo, 162 hp, 1984.5 240T models in NA