msd and starter wiring

Since we don't know what you've done, it's pretty difficult to tell you what to do. In other words, you've made some changes.

How does this Ford solenoid figure in? What are you doing with it?

The "wire for the starter solenoid" should be the same wire that always went to it.

(You running a factory underhood harness or aftermarket, or what?)

Are you running a safety disconnect? This will change things because you'll have to incorporate something to kill the alternator, otherwise the engine can stay running on the alternator, with the battery disconnect pulled

The factory fuse boxes originally got their power right from the battery--via the big post on the original starter relay. What have you done to change that?

On the diagram below, follow from the battery--to the starter relay--wire marked fusable link--to "J" on the bulkhead connector is red which goes to ammeter, then black coming OUT of the ammeter, follow that and there is an IN HARNESS splice (on the diagram marked red-tr) which feeds up to the fusebox

http://www.mymopar.com/downloads/1971/71ValiantA.JPG

http://www.mymopar.com/downloads/1971/71ValiantB.JPG