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Re: Performance Lacking in a 383 Build.
It's not the traditional way, but consider taking the truck to a chassis dyno for tuning. It's the only way to really diagnose the issue in a deliberate way. You need data to know what to change. Could be a long list of possible causes. Could be fuel (need a wideband), could be timing, could be spark, could be the cam timing is off. Could be push rod length, could be airflow, etc.
Good luck!
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