Lately And ya'll may know of them already, I found 2 good sites. www.partstrain.com, and www.centuryperfomance.com Parts train has a lot of hard to find parts, and the Century performance has a great tech section. I looked up the info on an old Mallory distributor, and for the information not directly posted I sent an inquiry to their tech department and got all I needed. Wiring diagram, coil selection, MSD box info, and some other good feedback.