Chevy 5.0 305 Shortblock - RHD - 1980-1985

Description

The 1980s saw General Motors develop several improvements to the 305 introduced the decade before.

This includes initial attempts at fuel injection and GM’s “CCC” (computer command center” engine management.

The 305 remained a popular engine at GM, featuring in almost every production vehicle in some form throughout the 1980s.

LG3

First introduced in 1976, the LG3 remained in production until 1982, ultimately being phased out in favor of the LG4 and more efficient and performance-minded engine configurations.

LG4

The LG4 was introduced in 1978 using a very similar configuration to the LG3. Changes to the fuel management system gave it approximately 15-30 more horsepower, however. Various iterations of the LG4 remained in production until 1987.

LU5

In production from 1982-84, the LU5, also known as the Crossfire EFI 5.0, including a dual TBI injection system designed from the 1969 Chevy Camaro Z28’s Crossfire Intake. This system was placed on top of the stock LG4 305, but failed to produce the kind of performance upgrade GM thought it would.

These engines are uncommon because, as an early TBI, most owners, mechanics, and dealerships lacked the capabilities to work on them efficiently.

L69

The L69 began production in late 1983. It was GM’s high-performance 305, available in the Firebird Trans Am, Camaro Z28, IROC-Z, and the Monte Carlo SS. It is one of the best-performing engines in its run, though a lot of that can be attributed to the aggressive camshaft, four-barrel carburetor, and the F-Body’s free-flowing exhaust system.

LE9

The LE9 included a four-barrel carburetor and the LM1 cam. It ran from 1981 to 1986. It was the high-output model used predominantly in GM heavy-duty trucks and large vans.

Makes & Models

• 1980-1985 Camaro
• 1980-1985 Caprice
• 1980-1985 Malibu, El Camino/Caballero, Mote Carlo
• 1980-1985 Chevy/GMC full-sized trucks, vans, and sports utility vehicles under 8500 pounds
• 1980-1985 Buick Regal
• 1980-1981 Checker Marathon
• 1982-1986 Pontiace Bonneville (G-body)
• 1980-1985 Pontiac Firebird
• 1981-1985 Pontiac Grand Prix
• 1982- 1986 Pontiac Parisienne (B-body & B-body wagon)

1980-1985 Chevy 305s from Mabbco

• Shortblock Chevy 305
• Longblock Chevy 305

Chevy 305 Camshafts, Cylinder Heads, and Other Parts

• GM/Chevy 305 - Cylinder Heads- 1980-1985
• GM/Chevy 305 - Crankshaft - 1980-1985
• GM/Chevy 305 Master Engine Rebuild Kit - 1980-1985