Engine profile

1974 Chevrolet Corvette V8 range

Chevrolet small-block and Mark IV big-block V8 · 350 cubic inches · Chevrolet Motor Division

Engine Choices summarized from reviewed factory and marque references. 1974 Chevrolet Corvette

Engine Summary

1974 Corvette L48 350/1951974 Corvette L82 350/2501974 Corvette LS4 454/270

Identification reference

Source-backed component numbers, codes, stampings, and application notes.

Value: 3970010 for 350 applications; 3999289 for 454 applications
Application: Casting number is one part of an identity check and does not prove original installation
Type: block / casting number
Car pages: 1974 Chevrolet Corvette

Value: CKZ/CLA/CLB/CLC L48; CLD/CLH/CLR/CLS L82; CWM/CWR/CWS/CWT LS4
Application: Transmission and emissions equipment alter the suffix; castings, dates, partial VIN, induction, ignition, and records must agree
Type: engine assembly / stamp
Location: Front block pad and casting locations
Car pages: 1974 Chevrolet Corvette

Value: 195 SAE net hp; 275 lb-ft; 8.5:1; Rochester Quadrajet; J VIN engine letter
Application: Standard engine; 27,318 installations implied after subtracting L82 and LS4 orders
Type: engine assembly / specification
Car pages: 1974 Chevrolet Corvette

Value: 250 SAE net hp; 285 lb-ft; 9.0:1; Rochester Quadrajet; T VIN engine letter
Application: Optional high-performance small-block; 6,690 orders
Type: engine assembly / specification
Car pages: 1974 Chevrolet Corvette

Value: 270 SAE net hp; 380 lb-ft; 8.25:1; Rochester Quadrajet; Z VIN engine letter
Application: Optional final-year big-block; 3,494 orders
Type: engine assembly / specification
Car pages: 1974 Chevrolet Corvette

1 linked car page.

Two-seat fiberglass coupe with removable roof panels and fixed rear glass, or convertible with folding soft top

First Corvette with body-color urethane impact covers at both ends