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Small Block Chevy Suffix Codes: CMK - CUD
GM body designation. All these are identified here. Quickly, A = Chevelle, F = Camaro, X = Nova. If you're looking at the engine code - this is already known. If you're looking at the casting # information and it mentions 3970010 "A/F/X/Y/B".... basically this means "it's used in everything", whereas if it simply states "Y"... this means Corvette.
| RPO |
FY |
CID |
Appl |
VIN |
HP |
BBLS |
Body/Comments |
| CMK |
1974 | 350 | t400 NB2 pol/taxi | | - | 4 | full size |
| CML |
1975 | 350 | | | 155 | 4 | Camaro |
| CML |
1976 | 350 | LM1 | L | 165 | 4 | F X |
| CML |
1980 | 305 | LG4 | H | 155 | 4 | Camaro |
| CML |
1980 | 350 | LM1 | L | 190 | 4 | Z-28 |
| CMM |
1975 | 350 | LM1 | | 165 | 4 | A B F |
| CMN |
1975 | 350 | LM1 | L | 165 | 4 | A B F |
| CMN |
1980 | 305 | LG4 | H | 155 | 4 | G |
| CMP |
1991 | 350 | L98, a/t | 8 | 240 | TPI | Firebird |
| CMR |
1974 | 350 | tur hydro trans. | - | 145 | 2 | A |
| CMR |
1978 | 350 | m/t | L82 4 | 220 | 4 | Vette/Z-28 |
| CMR |
1980 | 305 | auto trans. | H LG4 | 155 | 4 | full size |
| CMS |
1974 | 350 | m/t, 4 spd | | 185 | 4 | Camaro |
| CMS |
1978 | 350 | a/t | L82 4 | 220 | 4 | Vette |
| CMS |
1980 | 305 | auto trans. | H LG4 | 155 | 4 | full size |
| CMT |
1974 | 350 | t4OO | L82 | 245 | 4 | Camaro/Chevy II |
| CMT |
1978 | 350 | LM1 | L | 170 | 4 | B |
| CMT |
1980 | 305 | auto trans. | H LG4 | 155 | 4 | full size/Chevy II |
| CMU |
1975 | 350 | 145 | - | - | 2 | A F X |
| CMX |
1975 | 350 | 145 | - | | 2 | full size |
| CMY |
1975 | 350 | 145 | - | - | 2 | FXB |
| CNA |
1970 | 350 | manual trans. | - | 360 | 4 | Z28 |
| CNA |
1982 | 350 | Police LM1 | L | 185 | 4 | B |
| CNB |
1970 | 350 | tur hydramatic | | 360 | 4 | Z28 |
| CNB |
1982 | 350 | Police LM1 | L | 185 | 4 | B |
| CNC |
1970 | 307 | manual trans. | - | 200 | 2 | A F X |
| CND |
1970 | 307 | manual 4 spd | - | 200 | 2 | A F X |
| CND |
1970 | 350 | manual trans. | - | 250 | 2 | B |
| CNE |
1970 | 307 | Powerglide | - | 200 | 2 | A F X |
| CNF |
1970 | 307 | tur 350 trans. | - | 200 | 2 | A F X |
| CNF |
1982 | 350 | Police LM1 | L | 185 | 4 | B |
| CNG |
1970 | 307 | m/t | | 200 | 2 | El Cam/Chevy II |
| CNH |
1970 | 307 | Powerglide | | 200 | 2 | El Cam/Chevy II |
| CNH |
1982 | 350 | Police LM1 | L | 185 | 4 | B/Bel Air/Kingswd |
| CNI |
1970 | 350 | manual trans. | - | 250 | 2 | AFX |
| CNJ |
1970 | 350 | manual trans. | - | 300 | 4 | A F X/Bel Air/Kingswd |
| CNK |
1970 | 350 | Powerglide | - | 300 | 4 | A F X/Bel Air/Kingswd |
| CNM |
1970 | 350 | Powerglide | - | 250 | 2 | A F X/Bel Air/Kingswd |
| CNN |
1970 | 350 | tur 350 | - | 250 | 2 | A F X |
| CNP |
1970 | 350 | 4 spd, pol/taxi | - | 250 | 2 | Caprice/Bel Air/Kingswd |
| CNQ |
1971 | 350 | manual trans. | - | 300 | 4 | full size |
| CNR |
1970 | 350 | tur hydro trans | - | 300 | 4 | Caprice/Bel Air/Kingswd |
| CNS |
1970 | 350 | Pwrglide, pol/taxi | - | 300 | 4 | Caprice/Bel Air/Kingswd |
| CNT |
1970 | 350 | t/h trns, pol/taxi | - | 300 | 4 | Caprice/Bel Air/Kingswd |
| CNT |
1978 | 350 | auto trans. | L | - | - | full size |
| CNU |
1970 | 350 | Powerglide trans. | | 250 | 2 | full size |
| CNV |
1970 | 350 | tur hydro trans. | | 250 | 2 | Caprice |
| CNW |
1970 | 350 | Pwrglide, pol/taxi | | 250 | 2 | Caprice |
| CNX |
1970 | 350 | t/h trns, pol/taxi | | 250 | 2 | Caprice |
| CPA |
1976 | 305 | vins; 76:Q, 77:U | LG3 | 145 | 2 | F X |
| CPA |
1980 | 267 | L39 | J | 120 | 2 | G |
| CPC |
1976 | 305 | vins; 76:Q, 77:U | LG3 | 145 | 2 | F X |
| CPC |
1980 | 267 | auto trans. | J L39 | 120 | 2 | G |
| CPD |
1980 | 267 | J L39 | | 120 | 2 | Camaro |
| CPH |
1980 | 267 | auto trans. | J L39 | 120 | 2 | full size |
| CPJ |
1976 | 305 | LG3 | Q | 140 | 2 | F X |
| CPJ |
1978 | 305 | LG3 | U | 145 | 2 | X |
| CPK |
1977 | 305 | LG3 | U | 145 | 2 | Monza |
| CPL |
1977 | 305 | LG3 | U | 145 | 2 | Monza |
| CPL |
1980 | 267 | L39 | J | 120 | 2 | full size |
| CPM |
1977 | 305 | LG3 | U | 145 | 2 | B X |
| CPM |
1980 | 267 | L39 | J | 120 | 2 | G |
| CPR |
1977 | 305 | LG3 | U | 145 | 2 | B |
| CPR |
1980 | 267 | L39 | J | 120 | 2 | G |
| CPS |
1977 | 305 | LG3 | U | 145 | 2 | X |
| CPT |
1977 | 305 | LG3 | U | 145 | 2 | X |
| CPU |
1977 | 305 | LG3 | U | 145 | 2 | Monza |
| CPX |
1977 | 305 | LG3 | U | 145 | 2 | Monza |
| CPY |
1977 | 305 | LG3 | U | 145 | 2 | F A X |
| CPZ |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CO |
1958 | 283 | m/t, 3 spd | | 230 | 4 | Vette |
| CR |
1958 | 283 | m/t, 3 spd | | 250 | FI | Vette |
| CR2 |
1975 | 350 | | | | | Chevelle |
| CRA |
1977 | 305 | LG3 | U | 145 | 2 | A |
| CRA |
1982 | 305 | LG4 | H | 145 | 4 | F B G/Chevelle/Monte |
| CRA |
1982 | 305 | Roch E4ME carb. | H LG4 | 145 | 4 | F G B |
| CRB |
1977 | 305 | LG3 | U | 145 | 2 | B |
| CRC |
1975 | 350 | | | | | F A X/Chevy II |
| CRC |
1977 | 305 | LG3 | U | 145 | 2 | Monza |
| CRD |
1972 | 350 | tur hydro, A.I.R. | L65 | 165 | 2 | Camaro/Bel Air/Kingswd |
| CRD |
1975 | 350 | - | | | | F A X/Chevelle/Monte |
| CRD |
1977 | 305 | LG3 | U | 145 | 2 | Monza |
| CRE |
1970 | 350 | tur 350 | | 300 | 4 | A F X |
| CRF |
1975 | 350 | | | | | B |
| CRF |
1977 | 305 | LG3 | U | 145 | 2 | A |
| CRG |
1972 | 350 | man trans, A.I.R | L65 | 165 | 2 | Camaro |
| CRH |
1970 | 400 | | | 265 | 2 | A |
| CRH |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CRJ |
1975 | 350 | m/t, 4 spd | J L48 | 165 | 4 | Vette |
| CRK |
1972 | 350 | t/h A.I.R. | L48 | 200 | 4 | Nova |
| CRK |
1975 | 350 | tur 400 | J L48 | 165 | 4 | Vette |
| CRL |
1972 | 350 | m/t, A.I.R. | L48 | 200 | 4 | Nova/Monte |
| CRL |
1975 | 350 | h/p, 4 spd | T L82 | 205 | 4 | Vette |
| CRL |
1977 | 305 | LG3 | U | 145 | 2 | Starfire |
| CRM |
1975 | 350 | tur 400, h/p | T L82 | 205 | 4 | Vette |
| CRM |
1977 | 305 | LG3 | U | 145 | 2 | Starfire |
| CRR |
1975 | 350 | | | | | Camaro |
| CRS |
1972 | 350 | a/c, tur 400, A.I.R. | LT1 | 255 | 4 | Vette |
| CRS |
1972 | 350 | a/t, a/c | L LT1 | 255 | 4 | Vette |
| CRS |
1975 | 350 | | | | | F B |
| CRS |
1982 | 267 | E2ME carb. exc Cal | J | - | 2 | Malibu |
| CRT |
1970 | 350 | solid cam | LT1 | 360 | 4 | A |
| CRT |
1972 | 350 | 4 sp]d, A.I.R. | L LT1 | 255 | 4 | Vette |
| CRT |
1972 | 350 | LT1 | | 255 | 4 | Vette |
| CRT |
1975 | 350 | - | | | - | F X |
| CRT |
1976 | 350 | - | | 165 | 4 | Vette |
| CRT |
1977 | 305 | LG3 | U | 145 | 2 | Starfire |
| CRU |
1975 | 350 | | | | | A B F X |
| CRU |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CRW |
1975 | 350 | | | | | full size |
| CRW |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CRX |
1975 | 350 | - | | 155 | 4 | A B |
| CRX |
1975 | 350 | - | | 145 | 2 | F X |
| CRX |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CRY |
1975 | 350 | | | | | full size/Bel Air/Kingswd |
| CRY |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CRZ |
1975 | 350 | | | | | F B X |
| CRZ |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CS |
1958 | 283 | m/t, 3sp, hi lift cam | - | 290 | FI | Vette |
| CSA |
1973 | 400 | tur hydro trans. | LE2 U | 175 | 2 | B |
| CSA |
1976 | 400 | LT4 | U | 175 | 4 | A/Bel Air/Kingswd |
| CSB |
1973 | 400 | tur hydro trans. | LE2 U | 175 | 2 | Caprice |
| CSB |
1976 | 400 | LT4 | U | 175 | 4 | A |
| CSC |
1973 | 400 | t/h trans., Calif | LE2 U | 175 | 2 | Caprice |
| CSD |
1973 | 400 | t/h trans., Calif | LE2 U | 175 | 2 | Caprice |
| CSF |
1976 | 400 | LT4 | U LT4 | 175 | 4 | A B |
| CSH |
1972 | 350 | tur hydro, pol/tax | | 165 | 2 | A B/Bel Air/Kingswd |
| CSH |
1975 | 400 | LT4 | U LT4 | 175 | 4 | A B |
| CSJ |
1972 | 350 | manual trans. | | 165 | 2 | B/Bel Air/Kingswd |
| CSJ |
1976 | 400 | a/t | LT4 | 175 | 2 | B |
| CSK |
1973 | 400 | tur hydro trans. | LE2 U | 175 | 2 | B |
| CSL |
1973 | 400 | t/h, NB2 | LE2 U | 175 | - | full size |
| CSM |
1973 | 400 | t/h trans., Calif | LE2 U | 175 | 2 | Caprice |
| CSM |
1975 | 400 | LT4 | U LT4 | 175 | 4 | Sprint |
| CSR |
1975 | 400 | LT4 | U LT4 | 175 | 4 | B |
| CSS |
1975 | 400 | LT4 | U LT4 | 175 | 4 | B |
| CST |
1975 | 400 | LT4 | U LT4 | 175 | 4 | B |
| CSU |
1974 | 400 | t350 | U LT4 | 175 | 4 | Chevelle |
| CSU |
1974 | 400 | t4OO NB2 | U LT4 | 175 | 2 | full size |
| CSW |
1974 | 400 | a/t | U LT4 | 175 | 2 | B |
| CSW |
1974 | 400 | t4OO | U LT4 | 175 | 2 | full size |
| CSW |
1976 | 400 | LT4 | U LT4 | 175 | 4 | A B |
| CSX |
1974 | 400 | t350 | U LT4 | 175 | 4 | A B/Kingswd |
| CSX |
1976 | 400 | LT4 | U LT4 | 175 | 4 | A B |
| CT |
1958 | 283 | m/t, 3 spd | | 245 | 8 | Vette |
| CTA |
1972 | 400 | tur hydramatic | LE2 U | 175 | 2 | B |
| CTA |
1974 | 400 | a/t | U LT4 | 175 | 2 | A B |
| CTA |
1978 | 305 | LG3 | U | 145 | 2 | Monza |
| CTB |
1970 | 350 | high perf, 4 spd | LT1 | 350 | 4 | F X A |
| CTB |
1972 | 400 | man trans., A.I.R. | | | 4 | Caprice |
| CTB |
1974 | 400 | t/h trns, pol/taxi | | 175 | 2 | Caprice |
| CTB |
1975 | 400 | a/t | | 175 | 4 | A |
| CTB |
1978 | 305 | LG3 | U | 145 | 2 | Monza |
| CTC |
1970 | 350 | high perf, tur 400 | - | 320 | 4 | A/Bel Air/Kingswd |
| CTC |
1970 | 350 | LT1 | - | 360 | 4 | F X |
| CTC |
1974 | 400 | t/h trans., Calif | - | 175 | 4 | A B |
| CTC |
1978 | 305 | LG3 | U | 145 | 2 | Monza |
| CTD |
1974 | 400 | tur hydro trans. | | 175 | 4 | Caprice |
| CTD |
1978 | 305 | LG3 | U | 145 | 2 | Monza/Bel Air/Kingswd |
| CTF |
1978 | 305 | LG3 | U | 145 | 2 | Monza |
| CTH |
1978 | 305 | LG3 | U | 145 | 2 | F X |
| CTJ |
1974 | 400 | tur hydro trans. | | 175 | 4 | B/Bel Air/Kingswd |
| CTJ |
1978 | 305 | LG3 | U | 145 | 2 | Nova |
| CTK |
1972 | 307 | tur hydramatic | | 130 | 2 | A F X |
| CTK |
1974 | 400 | t/h, pol/taxi, Calif | | - | 4 | Caprice |
| CTK |
1978 | 305 | LG3 | U | 145 | 2 | F X |
| CTL |
1970 | 350 | 4 spd trans. | | 300 | 4 | Vette |
| CTL |
1972 | 350 | tur hydramatic | L65 | 165 | 2 | A F X |
| CTL |
1975 | 400 | LT4 | U | 175 | 4 | B A |
| CTL |
1978 | 305 | LG3, a/t | U | 145 | 2 | B |
| CTM |
1970 | 350 | tur 400 | | 300 | 4 | Vette |
| CTM |
1975 | 400 | LT4 | U | 175 | 4 | B |
| CTM |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CTN |
1970 | 350 | high perf, a/c, m/t | - | 350 | 4 | Vette |
| CTO |
1970 | 350 | h/p, a/c, m/t | - | 350 | 4 | Vette |
| CTP |
1970 | 350 | h/p, t/ign., m/t | - | 350 | 4 | Vette |
| CTQ |
1970 | 350 | h/p, t/ign, a/c, m/t | - | 350 | 4 | Vette |
| CTR |
1970 | 350 | spec hi perf, m/t | LT1 | 370 | 4 | Vette |
| CTR |
1975 | 400 | LT4 | U | 175 | 4 | B A |
| CTR |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CTS |
1975 | 400 | LT4 | U | 175 | 4 | B |
| CTU |
1970 | 350 | H.E.I., sp hiper, m/t | LT1 | 370 | 4 | Vette |
| CTU |
1975 | 400 | LT4 | U | 175 | 4 | A B |
| CTV |
1970 | 350 | s h/p, m/t, t/ign. | LT1 | 370 | 4 | Vette |
| CTW |
1975 | 400 | LT4 | U | 175 | 4 | B |
| CTW |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CTX |
1975 | 400 | LT4 | U | 175 | 4 | A B |
| CTX |
1978 | 305 | LG3 | U | 145 | 2 | G |
| CTY |
1976 | 400 | LT4 | U | 175 | 4 | B |
| CTZ |
1976 | 400 | LT4 | U | 175 | 4 | B |
| CU |
1958 | 283 | m/t, 3sp, hi lift cam | - | 270 | 8 | Vette |
| CUA |
1975 | 350 | m/t, 4 spd | J L48 | 165 | 4 | Vette |
| CUA |
1980 | 305 | LG4 | H | 155 | 4 | B |
| CUA |
1988 | 350 | L98, a/t | 8 | 225 | TPI | Firebird |
| CUB |
1975 | 350 | 4 spd trans. | J L48 | 165 | 4 | Vette |
| CUB |
1977 | 350 | LM1 | L | 170 | 4 | B |
| CUB |
1980 | 305 | LG4 | H | 155 | 4 | B |
| CUC |
1977 | 350 | LM1 | L | 170 | 4 | B |
| CUC |
1980 | 305 | LG4 | H | 155 | 4 | B |
| CUD |
1975 | 350 | h/p, 4 spd | T L82 | 205 | 4 | Vette |
| CUD |
1977 | 350 | LM1 | L | 170 | 4 | B |
| CUD |
1980 | 305 | LG4 | H | 155 | 4 | B |
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