MSD, can you tell the difference?

Back in the late 80s/early 90s I was driving a 66 Chevelle SS 396. The car ran like crap in the winter on the reformulated gas.

I did everything I could with the stock components……. New parts, plugs and everything in tune .

The only thing that solved my problem was an MSD system.

On a street car that is running fine with the stock stuff, an MSD system is probably not worth it.