Authenticity reference

Engine configuration

numbers matching · documented

Reference Details

Common issue: A replacement or later 409 can be installed with reproduction air-cleaner and emblem details. · 1962 Chevrolet Bel Air Sport Coupe 409
Confidence: documented · 1962 Chevrolet Bel Air Sport Coupe 409
Correct value: 409 block and heads with date-compatible assembly stamp, 11.0:1 specification, and one Carter four-barrel for RPO 580 or two for RPO 587 · 1962 Chevrolet Bel Air Sport Coupe 409
Where to check: Engine pad, casting numbers and dates, cylinder heads, intake, carburetors, and paperwork · 1962 Chevrolet Bel Air Sport Coupe 409
Common issue: 409 flags and a later W-engine do not establish a factory 409 order. · 1962 Chevrolet Impala Super Sport
Confidence: documented · 1962 Chevrolet Impala Super Sport
Correct value: Paperwork, assembly stamp, castings, dates, induction, and exhaust agree with the claimed 235, 283, 327, or 409 configuration · 1962 Chevrolet Impala Super Sport
Where to check: Engine pad, block and heads, carburetion, exhaust, and original records · 1962 Chevrolet Impala Super Sport
Common issue: Later Max Wedge parts or a replacement 413 represented as original. · 1962 Dodge Dart Max Wedge
Confidence: documented · 1962 Dodge Dart Max Wedge
Correct value: 11.0:1 410-hp or 13.5:1 420-hp Ramcharger 413 · 1962 Dodge Dart Max Wedge
Where to check: Engine casting, assembly evidence, compression and valvetrain inspection, dates, and paperwork · 1962 Dodge Dart Max Wedge
Common issue: Later Max Wedge parts, a replacement RB engine, or a tribute build represented as original. · 1962 Plymouth Savoy Max Wedge
Confidence: documented · 1962 Plymouth Savoy Max Wedge
Correct value: 11.0:1 410-hp or 13.5:1 420-hp Super Stock 413 with matching period evidence · 1962 Plymouth Savoy Max Wedge
Where to check: Engine casting and assembly evidence, dates, induction, valvetrain, exhaust, and paperwork · 1962 Plymouth Savoy Max Wedge
Common issue: A replacement 426 or later Max Wedge parts represented as original. · 1963 Dodge Polara Max Wedge
Confidence: documented · 1963 Dodge Polara Max Wedge
Correct value: 11.0:1 415-hp or 13.5:1 425-hp Ramcharger 426 · 1963 Dodge Polara Max Wedge
Where to check: Engine number, castings, dates, compression and valvetrain inspection, and records · 1963 Dodge Polara Max Wedge
Common issue: A replacement 426 or later Max Wedge parts represented as original. · 1963 Plymouth Savoy Max Wedge
Confidence: documented · 1963 Plymouth Savoy Max Wedge
Correct value: 11.0:1 415-hp or 13.5:1 425-hp Super Stock 426 · 1963 Plymouth Savoy Max Wedge
Where to check: Engine number, castings, dates, compression and valvetrain inspection, and factory records · 1963 Plymouth Savoy Max Wedge
Common issue: A later-built dual-quad 421 can reproduce appearance and power without proving factory installation. · 1963 Pontiac Catalina Super Duty 421
Confidence: documented · 1963 Pontiac Catalina Super Duty 421
Correct value: Period-compatible 390-, 405-, or 410-hp Super Duty 421 assembly with configuration-correct compression, carburetion, mechanical valve gear, and dates · 1963 Pontiac Catalina Super Duty 421
Where to check: Block and head castings, stampings, dates, pistons, camshaft, carburetor tags, intake, exhaust, and factory records · 1963 Pontiac Catalina Super Duty 421
Common issue: Replacement 426 or reproduction Stage III components represented as original. · 1964 Dodge Polara Max Wedge
Confidence: documented · 1964 Dodge Polara Max Wedge
Correct value: 11.0:1 415-hp or 12.5:1 425-hp Ramcharger 426 · 1964 Dodge Polara Max Wedge
Where to check: Engine number, castings, dates, compression, heads, cam, induction, and records · 1964 Dodge Polara Max Wedge
Common issue: Replacement 426 or reproduction Stage III components represented as original. · 1964 Plymouth Savoy Max Wedge
Confidence: documented · 1964 Plymouth Savoy Max Wedge
Correct value: 11.0:1 415-hp or 12.5:1 425-hp Super Stock 426 · 1964 Plymouth Savoy Max Wedge
Where to check: Engine number, castings, dates, compression, heads, cam, induction, and records · 1964 Plymouth Savoy Max Wedge
Common issue: Later 396 or 427 assemblies and reproduction dress-up parts can resemble the original engine. · 1965 Chevrolet Impala SS 396
Confidence: documented · 1965 Chevrolet Impala SS 396
Correct value: Date-compatible 396 block, heads, induction, compression and valve-train details agree with either L35 or L78 · 1965 Chevrolet Impala SS 396
Where to check: Engine pad, casting numbers and dates, cylinder heads, intake, carburetor, valve train, and paperwork · 1965 Chevrolet Impala SS 396
Common issue: A later-installed big block or 426 represented as factory-installed from displacement or badges alone. · 1965 Plymouth Satellite
Confidence: documented · 1965 Plymouth Satellite
Correct value: 273, 318, 361, 383, or 426 Street Wedge supported by the complete car record and age-correct components. · 1965 Plymouth Satellite
Where to check: VIN/body records, engine pad and casting dates, invoice, and service history. · 1965 Plymouth Satellite
Common issue: A swapped 327 or four-barrel equipment represented as born with the car from current appearance alone · 1965 Rambler Marlin
Confidence: reported · 1965 Rambler Marlin
Correct value: Body/serial evidence and engine ID support one of the 232, 287, 327 two-barrel, or 327 four-barrel paths · 1965 Rambler Marlin
Where to check: Serial plate, body tag, engine ID at right rear of block, bore/stroke evidence, carburetor, intake, exhaust, dates, and records · 1965 Rambler Marlin
Common issue: Replacement 327, four-barrel conversion, or later AMC V8 represented as born with the car · 1966 AMC Marlin
Confidence: documented · 1966 AMC Marlin
Correct value: VIN-code-supported 232 one/two-barrel, 287 two-barrel, or 327 two/four-barrel path with matching engine ID, displacement, induction, dates, and records · 1966 AMC Marlin
Where to check: VIN, engine ID at right rear of block, castings, carburetor, compression/induction hardware, exhaust, dates, and documents · 1966 AMC Marlin
Common issue: Later big-blocks, restamped pads, and reproduction dress-up parts can resemble factory equipment. · 1966 Chevrolet Impala Super Sport
Confidence: documented · 1966 Chevrolet Impala Super Sport
Correct value: Suffix, partial VIN where applicable, block, heads, induction, compression, valve train, and dates agree with the claimed RPO · 1966 Chevrolet Impala Super Sport
Where to check: Engine pad, block and head castings, intake, carburetor, valve train, and records · 1966 Chevrolet Impala Super Sport
Common issue: Later 350, 383, or L79-style 327 represented as factory-installed 1967 equipment · 1967 Acadian Canso
Confidence: documented · 1967 Acadian Canso
Correct value: 194, 250, 283, or 275-hp 327 with application-correct displacement, induction, stamp, castings, dates, and records · 1967 Acadian Canso
Where to check: Engine pad, block and head castings, carburetor, intake, ignition, dates, body records, and ownership history · 1967 Acadian Canso
Common issue: 290 four-barrel, replacement 343, later 360/401, induction conversion, or dress-up represented as original Marlin equipment · 1967 AMC Marlin
Confidence: documented · 1967 AMC Marlin
Correct value: VIN-code-supported 232 one/two-barrel, 290 two-barrel, or 343 two/four-barrel path with matching engine ID, displacement, induction, dates, and records · 1967 AMC Marlin
Where to check: VIN, engine ID at right rear of block, castings, carburetor, compression and induction hardware, exhaust, dates, and documents · 1967 AMC Marlin
Common issue: Later 343 or 360 swap represented as the original engine because it fits and looks period-correct. · 1967 AMC Rebel SST
Confidence: documented · 1967 AMC Rebel SST
Correct value: 232 one- or two-barrel, 290 two-barrel, 343 two-barrel, or 343 four-barrel that agrees with the car's engine code, tags, dates, induction, and records · 1967 AMC Rebel SST
Where to check: VIN and body plate context, valve-cover engine tag, block casting and stamp, intake, carburetor, air cleaner, and paperwork · 1967 AMC Rebel SST
Common issue: Later 350, 454, or upgraded 396 represented as factory installed · 1967 Beaumont Custom
Confidence: documented · 1967 Beaumont Custom
Correct value: 230, 250, 283, 327, or Sports Option 396 with application-correct stamp, castings, induction, dates, and records · 1967 Beaumont Custom
Where to check: Engine pad, block and head castings, carburetor, intake, ignition, dates, and GM Canada documentation · 1967 Beaumont Custom