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Old Sep 8, 2015 | 08:33 PM
  #16  
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Jklnhyd
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hmmm, i will go read up on it, ty. But if the smog guy says I have not cats and can keep the headers, Im not going to argue.
 
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Old Sep 9, 2015 | 03:19 PM
  #17  
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For what it's worth...

Typically, a catalytic converter equipped truck will have the wording "unleaded fuel only" or "unleaded fuel" on the lower portion of the dashboard gas gauge.
Trucks without cats used regular fuel and didn't have the warnings on the gauges.

When the trucks were new there were similar labels on the fuel caps / doors or near the fuel filler. These labels usually didn't last long.

The unleaded fuel tank filler pipes had restrictors in them to prevent non-unleaded fuel nozzles form being inserted. The unleaded nozzle was smaller than the "regular" and "premium" nozzles.

Hope this is helpful.
 
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Old Sep 9, 2015 | 04:21 PM
  #18  
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Thanks for the responses. Very informative
 
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Old Sep 9, 2015 | 05:10 PM
  #19  
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Well, I'm new to OHV Fords, but as a general statement, saying the only reason to have an A.I.R. smog pump is for catalytic converters is just wrong. There were factory smog pumps on cars back to 1968 model year, and the converters didn't hit until 1975. The earlier pumps did the same thing, pumped air into the exhaust manifolds where it was supposed to react with hot CO and unburned hydrocarbons.

R.
 
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Old Sep 10, 2015 | 01:14 AM
  #20  
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Originally Posted by dogdays
Well, I'm new to OHV Fords, but as a general statement, saying the only reason to have an A.I.R. smog pump is for catalytic converters is just wrong.

There were factory smog pumps on cars back to 1966 model year (C6AZ-9A486-A), and the converters didn't hit until 1975.
T/E (Thermactor Emission) introduced in 1966 on Passenger Cars, F100's, Bronco's and Econolines.

Here in CA, T/E was mandatory, besides cars, in 1966/67 F100's, early 1968 F100's, all I-6's and V8's.
 
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