Exactly.
The important thing is the main power wire to the MSD box (heavy red) gets a good connection into the power feeds. MSD recommends attachin git close to the battery positive. The only problem with that is when the engine is running, power will have to flow all the way from the alternator to that post. Its only a couple amps, so its not a big deal. At 6000 rpms you may see the ammeter indicate charge, because 6amps is going toward the battery. Really not a big deal. Don't like that, power it direct from the alternator.
Yes I've been running an MSD for something close around 80,000 miles with stock alternators, 37 amp to 60 amp.