What I have to offer is a 2DC8 Dual Cylinder Head Heat Gage that I purchased from Westberg Manufacturing Inc. in Sonoma California 2 years ago. I had this on my Rupp Chaparral and it's works great and it's period correct for the year. The problem is me as my eyes are changing, go figure. I made a custom bracket as you can see from the pictures and it fits 5/8" tubes with a center distance of 6.250. I also installed a kill switch. The assembly comes with 2- 48" 14mm plug leeds and one main harness that's 19"long. For those of you that aren't familar with Westberg Manufacturing or commonly know as Westberg Tach, They have been around since the 1960's, same town, same location Any questions feel free to contact me at 585-748-5470.Thanks.