Part profile

1973 GTO L78 400 engine assembly

Name: 1973 GTO L78 400 engine assembly
Brand: Pontiac

engine · Pontiac

400 and 455 V8: 230 or 250 net hp 1973 Pontiac GTO

Why It Matters

The standard 1973 GTO engine was the 230-net-hp L78 400 four-barrel; car-level originality requires codes, stamps, dates, castings, and paperwork.

1973 GTO 400 assemblyL78 400 four-barrel

1 linked car page.

LeMans Coupe or LeMans Sport Coupe two-door Colonnade hardtop

GTO option on LeMans Coupe or LeMans Sport Coupe

wheel

axle

suspension

transmission

engine

transmission

brake

carburetor

transmission

interior

body

Pontiac Motor Division, General Motors 1973 LeMans Sport Coupe sales brochure

New Hampshire GTO Association 1973 GTO axle codes