MSD Ignition Question

What distributor do you have?

Your diagrams show a three wire distributor which is MSD's "ready to run dist"

You Said "Okay, this is just a cruising car, no racing or anything like that." If this is just a street car then I wouldn't recommend that distributor, I would just use a two wire MSD distributor or a good Mopar electronic distributor with an MSD box. The "ready to run" distributor is a good distributor but was designed for street rods and and cars with no room for electronics, that is why they don't need the box. Not to mention they are twice the money of a standard MSD distributor.