Engine Summary
- Manufacturer
- Pontiac
- Family
- Pontiac large-journal Super Duty V8
- Displacement
- 421 cubic inches
Also Known As
1962 Pontiac 421 Super Duty1962 SD-4211962 Pontiac 405-hp 4211962 Pontiac dual-quad 421
Engine profile
1962 Pontiac Super Duty 421 V8
Pontiac large-journal Super Duty V8 · 421 cubic inches · Pontiac
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
Published McKellar No. 10 lift conflict
- Value
- Pontiac/NHRA sheet: 0.465 inch; other reviewed exact-year and specialist records: approximately 0.445/0.447 inch with 1.65:1 rockers
- Application
- 1962 Super Duty 421; applicable revision or measurement basis unresolved
- Type
- camshaft / specification
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Catalina 421 Super-Duty - Survival Of The Quickest , 1962 Pontiac Full-Size Fact Sheet , 1962 Pontiac NHRA Specifications
Dual-Carter induction
- Value
- Carter AFB 3433S and 3435S; 405 hp at 5,600 rpm
- Application
- 1962 Super Duty 421
- Type
- carburetor / part number
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Full-Size Fact Sheet , 1962 Pontiac NHRA Specifications , 421 Pontiac Drag Test
Early and revised cylinder heads
- Value
- 540306 early heads; 544127 revised heads with 2.02/1.76-inch valves
- Application
- 1962 Super Duty 421 production sequence
- Type
- cylinder head / casting number
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Catalina 421 Super-Duty - Survival Of The Quickest , 1962 Pontiac NHRA Specifications
Bore, stroke, and compression
- Value
- 4.09375 x 4.00 inches; 11.0:1
- Application
- 1962 factory-installed Super Duty 421
- Type
- engine assembly / specification
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Catalina 421 Super-Duty - Survival Of The Quickest , 1962 Pontiac Full-Size Fact Sheet , 1962 Pontiac NHRA Specifications
Competition short-block hardware
- Value
- Four-bolt block, forged 542990 crankshaft, 529238 rods, and Mickey Thompson forged pistons
- Application
- 1962 Super Duty 421
- Type
- engine assembly / part number
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Catalina 421 Super-Duty - Survival Of The Quickest , 421 Pontiac Drag Test
Published peak-torque conflict
- Value
- Reviewed exact-year records cite either 425 or 430 lb-ft; the applicable release or production sequence is unresolved
- Application
- 1962 Super Duty 421
- Type
- engine assembly / specification
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Catalina 421 Super-Duty - Survival Of The Quickest , 1962 Pontiac Full-Size Fact Sheet , 1962 Pontiac NHRA Specifications , 421 Pontiac Drag Test
Aluminum runner intake manifold
- Value
- 542991, 9770859, or 9770319 listed in the NHRA specification
- Application
- 1962 Super Duty 421
- Type
- intake manifold / casting number
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac NHRA Specifications
Mechanical valve train
- Value
- McKellar No. 10 camshaft and 1.65:1 rocker arms
- Application
- 1962 Super Duty 421
- Type
- valve train / specification
- Car pages
- 1962 Pontiac Catalina Super Duty 421
Sources: 1962 Pontiac Catalina 421 Super-Duty - Survival Of The Quickest , 1962 Pontiac Full-Size Fact Sheet , 1962 Pontiac NHRA Specifications
Cars Using This Engine
1 linked car page.
Series 23 two-door sedan (2311) or hardtop Sport Coupe (2347)
1962 Pontiac Catalina Super Duty 421
Factory-installed special-order competition package