Sure this has been asked before but im looking for a company with the best hood tach for a 69 that I have set up with HEI
Ames has one or 239 says it will work with MSD

https://secure.amesperf.com/qilan/Detail_Web?part_num=FD354F&order_number_e=NTA3OTk2OQ%3D%3D%0A&web_access=Y

If anyone has purchased a tah and installed it in a NOS hood let me know how it went
I will have to have the hole drilled there is a pretty good you tube on this