I have an MSD Pro Billet 85551 Mechanical Advance Distributor for sale. I ran this distributor for about 4 years now. It has about 3500 miles on it. Was working perfect when I took it out. It is a little dirty and could use a good cleaning. I am selling it because I replaced it with a Pro Billet 8361 with vacuum advanced that is more suited to the way I use the car. These guys are running $281 from summit. I'd like $100 plus shipping for it. email me at wrprice @ verizon.net