Re: electronic carbs
Mine was broken, too, when I got it. I bought the sensor from the Chevy dealer 6 or 7 years ago after spending a whole afternoon trying to track it down at all of the local parts stores with no luck. I didn't notice any improvement in driveability. When I replaced my engine, I bought an older style quadrajet from JET Performance, and never looked back.
If it runs okay as it is, I would just leave it. If it doesn't, I would consider replacing it with an older style quadrajet or an Edelbrock carb.
Slonaker
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