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ENGINE SPECIFICATIONS
A Buick engine is stamped with two different identification codes. One is the engine production code which identifies the engine and its approximate production date. The other code is the engine serial number - it matches the VIN (vehicle identification number)
The 250 COD OHV6 engine number and production code number are on the right side, to the rear of the distributor.
The 350 CID V8 engine number is on the front of the left bank of cylinders. The production code number is between the left exhaust manifold and the two front spark plugs.
The 455 CID V8 engine number is between the two front spark plugs and the exhaust manifold. The production code number is between the tow rear spark plugs and the left exhaust manifold.

EXAMPLE:
F 12 07 SB
1 H 12 3456

Top Row:
  F = Flint
  12 = Month
  07 = Day
  SB = Trans. or Option usage
Bottom Row:
  1 = Year (1971)
  H = Flint
  123456 = Production Code

ENGINE
CODE

DF
EA
TO
TD
TB
TC
TA
TR
TS
NO.
CYL.

6
6
8
8
8
8
8
8
8
CID
 
250
250
350
350
350
350
455
455
455*
HORSE
POWER

145
155
230
260
260
230
335
310
345
COMP.
RATIO

8.5:1
8.5:1
8.5:1
8.5:1
8.5:1
8.5:1
8.5:1
8.5:1
8.5:1
CARB
 

1BC
1BC
2BC
4BC
4BC
2BC
4BC
4BC
4BC
TRANS
 

Man 3-spd
TH-350
Man 3-spd or TH350
TH-350
Man 3-spd,4-spd,TH 350
TH 350
TH 400
Man 3-spd,4-spd, TH 400
Man 4-spd, TH 400
Engines available as indicated:
  • Skylark - DF,EA,TO,TD
  • Skylark Custom - TO,TD
  • GS - TB,TD,TR,TS
  • LeSabre & LeSabre Custom - TC,TO,TR
  • Centurion - TR,TA
  • Estate Wagon - TR
  • Electra 225 & Electra 225 Custom - TR
  • Riviera - TR
  • Riviera GS - TA
  • Sport Wagon - TO,TB




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