ENGINE IDENTIFICATION The engine identification code consists of the engine assembly plant, the engine assembly date, and a 2 or 3 letter suffix indicating the cubic inch displacement, the horsepower rating, and generally, what type of transmission was to be installed with the engine. Manual transmissions required a bushing in the rear of the bellhousing where an automatic transmission did not. Many engine "accessories" such as the carburetor, distributor, and exhaust manifolds were not installed at the engine assembly plant but rather at the final assembly plant. T = Tonawanda Engine Plant 0501 = May 1 EF = 396/350 L34 Manual 3-/4-speed w/HD Clutch Engine Assembly Plant - 1st letter | Code | Assembly Plant | V | Flint, Michigan | *T | Tonawanda Engine Plant | | |
Assembly Month - 1st and 2nd numbers | Number | Month | Number | Month | 01 | January | 02 | February | 03 | March | 04 | April | *05 | May | 06 | June | 07 | July | 08 | August | 09 | September | 15 | October | 11 | November | 12 | December | | | | |
Assembly Day - 3rd and 4th numbers 01...31 Engine | Transmission | Notes | Code | Size | HP | | | BB | 230-1 | 140 | Manual-3 | Heavy Duty Clutch/A.C. | BC | 230-1 | 140 | Manual-3 | Heavy Duty Clutch | BL | 230-1 | 140 | Powerglide | A.I.R. | BM | 230-1 | 140 | Powerglide | A.C./A.I.R. | BN | 230-1 | 140 | Manual-3 | Overdrive/A.I.R. | BO | 230-1 | 140 | Manual-3 | A.C./A.I.R. | CA | 230-1 | 140 | Manual-3 | Overdrive | CB | 230-1 | 140 | Manual-3 | A.C. | CC | 230-1 | 140 | Powerglide | | CD | 230-1 | 140 | Powerglide | A.C. | 250 ↓ | | | | | CM | 250-1 | 155-L22 | Manual-3 | Overdrive | CN | 250-1 | 155-L22 | Manual-3 | A.C. | CO | 250-1 | 155-L22 | Manual-3 | Overdrive/A.I.R. | CP | 250-1 | 155-L22 | Manual-3 | A.C./A.I.R. | CR | 250-1 | 155-L22 | Powerglide | A.C. | CS | 250-1 | 155-L22 | Powerglide | A.I.R. | CT | 250-1 | 155-L22 | Powerglide | A.C./A.I.R | 283 ↓ | | | | | DA | 283-2 | 195 | Manual-3 | Overdrive | DB | 283-2 | 195 | Manual-4 | | DE | 283-2 | 195 | Powerglide | | DI | 283-2 | 195 | Manual-3 | Overdrive/A.I.R. | DJ | 283-2 | 195 | Powerglide | A.I.R. | DK | 283-2 | 195 | Manual-4 | A.I.R. | DN | 283-2 | 195 | Manual-3 | Heavy Duty Clutch | 327 ↓ | | | | | EA | 327-4 | 275-L30 | Manual-3/4 | | EB | 327-4 | 275-L30 | Manual-3/4 | A.I.R. | EC | 327-4 | 275-L30 | Powerglide | A.I.R. | ED | 396-4 | 325 | Manual-3/4 | | EE | 327-4 | 275-L30 | Powerglide | L30 | EP | 327-4 | 325-L79 | Manual-3/4 | | EQ | 327-4 | 275-L30 | Manual-3 | Heavy Duty Clutch | ER | 327-4 | 325-L79 | Manual-3/4 | A.I.R. | ES | 327-4 | 325-L79 | Manual-3 | Heavy Duty Clutch | 396 ↓ | | | | | *EF | 396-4 | 350-L34 | Manual-3/4 | Heavy Duty Clutch | EG | 396-4 | 375-L78 | Manual-3/4 | | EH | 396-4 | 325-L35 | Manual-3/4 | A.I.R. | EJ | 396-4 | 350-L34 | Manual-3/4 | Heavy Duty Clutch/A.I.R. | EK | 396-4 | 325-L35 | Powerglide | | EL | 396-4 | 350-L34 | Powerglide | | EM | 396-4 | 325-L35 | Powerglide | A.I.R. | EN | 396-4 | 350-L34 | Powerglide | A.I.R. | ET | 396-4 | 325-L35 | TH-400 | | EU | 396-4 | 350-L34 | TH-400 | | EV | 396-4 | 325-L35 | TH-400 | A.I.R. | EW | 396-4 | 350-L34 | TH-400 | A.I.R. | EX | 396-4 | 375-L78 | Standard | A.I.R. |
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