That's an interesting problem. I'm in California and they are a little bit ahead of their time for emission control, smog. 3/4 ton trucks were not required to have any smog equipment till after 74-76, I don't know if that gives you an out or not. IIRC 64 was the first year for smog equipment for Chev an air pump, not counting the PCV valve. This varied by maker, Chrysler went lean burn so they had minimal equipment, I've never paid attention to f*rd. Disk brakes didn't appear on trucks till 71, and I don't know about passenger cars. That will do for starters.
Larry
