[Indyuke]

Finally solved my horrible off-idle stumble!

The 2G 2bbl carb in my 68 (307 cu) has always had an off idle stumble. Rebuilding the distributor and the carb didn't do much of anything except make the motor run smoother and accentuate the stumble issue.

I did what any good shade tree mechanic does when they are at loss when hours of internet searching and soliciting opinions from better minds don't turn up anything. Just started throwing parts at it.

A NOS venturi cluster from a chevy Vega, of all things, is what finally solved the issue. I now have quick, snappy throttle response, even on a cold motor. No backfiring into the carb or out the tailpipe. No perceived reduction in power. Motor runs smooth, good vacuum on the gauge. No rich smell in the exhaust.

I'm sure there's a gotcha in there somewhere, but so far the change just blows my mind! The engine now runs nearly as well as a modern fuel injected motor. On a venturi cluster meant for a 4-banger.