msd ignition
If you carefully strip back your harness you can remove "most" of that.
The connector for the original ignition box has 5 wires.
1 and 2 Two go to the distributor connector. You can strip those back.
3...One goes up and cuts into the ballast connections that is "ignition run." to the box
4...One goes to one side of the ballast. This is reduced voltage for the box
5...One goes to coil NEG, this triggers the coil
All of the above can "come out"
Here is a simplified diagram, but leaves out a couple. The far top right leads off to the bulkhead connector "ignition run"
the lower right terminal of the ballast should have a brown wire leading off to the bulhead. That is the bypass circuit. Both those need to be spliced together with the rest. Some wiring goes off to the field, and VR
Once you strip out the ballast and box, everything else must be spliced together. Your original coil POS wire can now hook to the MSD "small red" which is like a relay trigger to power up the box. Main power for the MSD is "hot" the big red and big black (ground)
If you carefully strip back your harness you can remove "most" of that.
The connector for the original ignition box has 5 wires.
1 and 2 Two go to the distributor connector. You can strip those back.
3...One goes up and cuts into the ballast connections that is "ignition run." to the box
4...One goes to one side of the ballast. This is reduced voltage for the box
5...One goes to coil NEG, this triggers the coil
All of the above can "come out"
Here is a simplified diagram, but leaves out a couple. The far top right leads off to the bulkhead connector "ignition run"
the lower right terminal of the ballast should have a brown wire leading off to the bulhead. That is the bypass circuit. Both those need to be spliced together with the rest. Some wiring goes off to the field, and VR
Once you strip out the ballast and box, everything else must be spliced together. Your original coil POS wire can now hook to the MSD "small red" which is like a relay trigger to power up the box. Main power for the MSD is "hot" the big red and big black (ground)