Trigger anything from a shift light to a tach to an RPM activation switch with the 12V power of an MSD Tach Signal GMR Pickup. You can clip it to a coil pack primary lead for a stable square waves or connect it to a diesel injector wire to install that tachometer with ease. No wire-splicing or -cutting required. Limited warranty.
An MSD Heat HEI Ignition Module produces an impressive 8.5 amps of juice for the high output you need. It provides over-rev protection, thanks to a programmable rev limiter that can be externally set, and an advanced dwell control improves high RPM output. A GM coil can be used. Limited warranty.
Adjust shift points and torque converter clutch behavior by installing an MSD Atomic Transmission Control. It's also capable of allowing you to choose different levels of shift firmness and between auto-shift mode and manual-shift mode. Dyno mode delivers repeatable chassis dyno results. Must be used with the MSD Atomic Transmission Control Wiring Harness (sold separately). Limited warranty.
Designed for non-current limiting ignitions, MSD Tach Adapters correct the operation of most volume-trigger tachometers or fuel-injection systems that don't work off the tach output terminal. You need it for triggering an MSD 6- or 7-Series Ignition with its white wire or points terminal. Limited warranty.