Originally Posted by
TheDesertRat
Yes, I have a 78 F150 that came with a 351 I believe but now has a 460 swapped into it. I am assuming that I will have to comply with a 78 F250 460 smog setup in order to get a referee to approve it. I believe the diagram I have is correct, just too small to read well but I welcome all information.
For a 1978 F150-250 with light duty emissions (GVW under 8500lbs), and California emissions, your truck's 460 should have the following emissions equipment:
- PCV = PCV valve
- TAC = Thermostatic Air Cleaner (yes they do have a hot air riser)
- AIS = Air Injection System (air pump)
- EVAP = Evaporative Emission Control (charcoal canister)
- OC = Catalytic Converter
- EGR = Exhaust Gas Recirculation (EGR Valve)
- SPK = Spark Control
- EGR-BPS = EGR Back-Pressure Sensor
- VTK = Vacuum Throttle Kicker
In case you're interested, your factory calibration number for a F150-250, 460 V8, Auto Trans, with California Emissions, should be: 8-66U RO.
Again, I do have a vacuum diagram, but it's very hard to read, PM me and I can email it to you.