The first time I built my '70 (out of an Esprit) I intended to install a hood tach on the shaker hood. So I bought an aftermarket one and painted it when I was painting the car. Then when assembling the car I sat in it and tried different locations on the hood. Couldn't find one I was happy with and knew once I drilled a hole I was committed so I put the tach aside thinking I'll try again "later". Then every couple years I'd get the tach out and go through the routine again without success. Finally I got a factory dash tach and installed it, but still, every couple years I'd get the hood tach out and try again. Finally, ( after almost 30 years) I sold the hood tach on Ebay. YMMV
