Vacuum Routing Diagrams: Mercury Cougar 1967-1970

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Vacuum Routing

• Engine Emission Reduction and Related Parts, Open and Closed Systems, 1967/69 8 Cylinder 390 GT, showing 6766, 6758, 6A664, 6A666 and 18572 hoses and valves.
• Vintage V8 Electronic Fuel Injection System Diagram - 1968 Mercury Cougar 428
  This document is a large hand-drawn schematic/installation diagram of an early electronic fuel injection (EFI) system for a V8 engine. It shows the complete layout of the system's electrical and fuel plumbing…