I killed a perfectly good 389 at age 16 when I rebuilt the carb.
The rebuild of my first carb went 100% fine, but then I found that I could get a bunch more idle rpm if a adjusted out the big center screw on the face of the AFB carb.
This I came to find was the idle air adjustment.
I left it that way and the motor ran so lean that the resulting detonation cracked two pistons!
So much for the knowledge of a fledgling 16 year old hot rodder!
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I do stuff for reasons.
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