The MSD harness even has a tag to help you. For those car crafters who would rather run a carburetor on a Gen III/IV engine, MSD created the original LS1/LS6 timing control box.

MSD/Holley has rebooted its popular 6014 ignition controller for LS engines with more features and easier operation.

7. At this point Eric delved into the MSD 6LS box and tried a different timing curve chip. There are six different pre-programmed curves from MSD for the LS engine, covering all levels of performance.

Using the MSD controller to retard timing under boost (compared to the NA combination), the dual-quad 6-71 383 produced 753 hp and 625 lb-ft of torque.