This is my first post here so I hope I don't mess it up. I'm fairly deep into rewiring my Pantera. Have been restoring it for close to 13 years, it's a '72'pre L and I'm getting close to the end game and will hopefully be driving it in the near future. Ok so here is my story for today. When I stripped the car I didn't take a lot of care in marking things and I didn't take enough photos. So today I found out that to make my old Tacho work with the MSD I'm going to need a Tach adapter 8920 and here in NZ the cost is around $220 and because of this and all the other expensive mistakes I've made I thought I would take a more measured approach and try and test my old Tach before making another mistake. So I jumped on this forum firstly to find out if I could get help with the correct pinout for the Tach and I was pleased to come across a photo and very good explanation. Thanks very much for that guys I am in your debt. There was some mention of how to test these Tachs too and so I buried my thoughts and have come up with a simple test assembly. Luckily I didnt throw my old points didtributor away and it came in very handy as you can see. So all you need is here.
1/ Distributor
2/ Coil
3/ Battery
4/ Tach to test
5/ Drill
I spun the distributor with my drill and I can declare the fastest speed of the drill is 3500 revs. I didn't hook up any HT leads so there was some arcs floating around but it works fine and I'm off to purchase one more thing to hide from the wife.
Cheers
Ross
