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#1
06-08-2026, 07:38 AM
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Stock GM HEI Distributor
Been wondering if changing the mechanical advance springs with lighter springs on my stock 350 with a HEI distributor would make any noticeable improvement just for cruising? I assume that the first thing to do is see how much timing and determine when (RPMs) that the timing is all in. Most everything I’m seeing is recommending 36 degrees all in by 2,600 to 2,800 RPM. Comments and experiences are appreciated.
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