Took the Blazer in for some fine tuning since it seemed to be running crappy. The shop says the distributor is shot. It was an old Summit copy of an MSD HEI. So, I jump online and order me up a new MSD Pro-billet HEI from Summit. I paid for next day air. The site said 1-2 days for shipping so I was expecting not to get the thing until Saturday, and the shop would already be closed for the weekend. To my surprise, even though I ordered it Thursday afternoon, it arrived this morning at 8:00 a.m. Not only did it get here fast, they threw in a nice baseball hat and a catalog. Very impressive.