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Re: Tuning Question
The Crane kit dd make one for points and another for HEI. You can buy a VA can that makes less advance than others. The early 327 high HP ones. You could slide a small piece of vacuum hose on the small end of the "L" rod to limit its travel some to decrease the amount of advance it provides
Bottom line is controlling how much VA is provided at at what RPM it goes out is the way to really fine tune a motor relative to timing. Especially on modified motors.
People who still run without VA get plugs loaded up quick at part throttle and less throttle response. that timed (ported) vacuum thing was a BS stab at emissions. Use manifold vacuum for VA
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