You may have saved yourself some grief on the vintage tachs, as a number of them wont work with modern distributors, and can even take them out. I had a friend give me a neat old Mallory tach when I built my Austin, and I was excited to get it. Installed it right away, and fired the car up to check function. It ran for about 15 seconds just fine, and then it pegged full scale and died.
My Austin has a Pertronix points eliminator electronic kit, and MSD 6AL box.
My Austin has a Pertronix points eliminator electronic kit, and MSD 6AL box.