Advice-Changing the timing cure on your HEI distributor? Timing recurve kits suck
The best way for me (heavy car) to get faster mechanical advance with a GM HEI distributor is to add mass to the stock weights and use the stock springs. Learn from me and don't be afraid to try stuff; it just might work, like this did!

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Modifying and custom curving a GM HEI distributor for street performance

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Episode 4 - GM HEI Recurve

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Chevy HEI Distributor: Shimming and timing info

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Performance Timing Curves For Dummies Like Me (Ignition Basics, Distributor Mods, And Tuning)

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Make That Thing JUMP When You Whack The Gas!

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MSD Distributor Advance Curve Kit Explained

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HEI Distributor Mechanical Advance weight kit

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How to wire an HEI Distributer

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What does it mean to lock out a distributor

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Dialing in your MSD distributor total timing advance

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Changing and Explaining Timing Curve on MSD Distributor

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HEI Ignition Tips for Your Engine

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Is that CHEAP distributor any Good?? Let's find out!

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Ignition timing tech you probably did not know!

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HEI Distributor Video Series (Part 3)

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Speedy Stephanie Quickly Tunes Up an HEI

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How to Diagnose an HEI Distributor Pickup Coil

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Recurving a distributor; why it is important to get performance from your engine!

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Distributor Advance curve kit

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