Quote:
Originally Posted by Trackerrrr
I suspected the carb would be the sticking point for a cat. Too many variables and inability to control the air/fuel ratio closely enough.
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You can control it fairly well post combustion (smog pump) by either developing your own control unit for a smog pump/1 wire oxygen sensor so the cat could work or finding a system (I think it's called a FFS in emissions lingo) from an ~80s/90s engine of similar displacement and retrofitting that. Given all the work involved I think a conversion to TBI w/ megasquirt would be easier, cheaper, and also improve mileage.