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Re: Mufflers VS Catalytic converters
I did a little reading on this myself not too long ago (I have a 65 Mustang with the same problem, car runs great, is tuned right, but backing out of the garage in the morning is a little stinky), and the general "consensus" seemed to be that carbureted engines, even properly tuned, just release too much unburnt fuel and would likely burn up a cat. I don't know how true that is or how long it would take, maybe it does, but would take a few years?
The best option would be adding a fuel injection kit and cat to your motor, but last I checked, most kits are still around 2K... for that price it would be LS time.
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