Complete instructional video on how to modify and install your GM HEI Large Cap Distributor with 4 pin module for use with the Holley Sniper EFI System. I apologize for the volume changes, not proud of it. If you don't already have a Sniper EFI System or need parts for this project speak with Chris @ http://EFISystemPro.com and he'll get you going. I bought the parts below elsewhere but I hadn't found EFI System Pro yet.

VIDEO INDEX:
1:08 Special Thanks Speech (Riveting!)
2:28 Parts Introduction
5:01 Locked Out Mechanical Advance
6:18 Replace Vac Canister with Manual Knob
7:54 Establishing Reference Angle / Timing
12:54 Phasing the Rotor
16:00 Wiring the Distributor
19:43 Holley ECU/Software Setup (Minimum Signal Voltage)
27:25 Static Timing Checks & Inductive Delay
30:32 GM HEI Timing Control Final Test
31:42 Conclusion Thanks for Watching!

In this video we used a generic branded GM HEI Distributor for a Chevy 250ci Inline 6, sourced from "SkipWhite" on eBay: https://www.ebay.ca/itm/352082630332

We also used a MSD Module Delete Harness from Speedway Motors: https://www.speedwaymotors.com/MSD88...

...and their GM HEI manual adjustment knob: https://www.speedwaymotors.com/HEIEx...

You could use a spare HEI cap (with holes drilled below the brass wire terminals) but even though one was seen in the video, it wasn't needed as the SpeedWay adjustment knob made it so easy.

That's it for new parts. The Holley Sniper EFI system was purchased from EFISystemPro.com a few months ago and seems to run our Large Cap Distributor for timing control perfectly.

Check out http://TurboCamaro.ca for extensive detail on HEI timing control and anything else relevant to this project.

A special thanks to Ethan Meixsell for providing all the music. His work is fantastic, check it out at www.ethanmeixsell.com.

Thanks for watching!