MSD is all Made in China now. (Some in Mexico)
If you want it to run right you need a distributor that can be tuned to your engine specs.
You need an adjustable vac can MSD is is not adjustable and connected to constant manifold vacuum source.
1 year warranty and a high return rate... not very reliable.
MSD themselves hired a independent engineer and they discovered that wide gaps are NOT the best way to go and retracted their previous thinking and came up with a whole new set of perimeters, starting with "Whats the compression ratio" it was published in Gwen Johnson's "Good Ink" a industry news and information service. We have never used those ridiculous .050 or bigger plug gaps, they just stress the entire ignition system and burn up spark plug electrodes.
We never use Japanese plugs in our American Muscle cars, either AC Delco, Champion or (my favorite) Autolite. Most street cars will do fine with 032-035.
Look at the features and reliability of the HRR688 that we build right here in the good Ole USA before you start hacking your wire harness up.