Dave, You need to buy an assembly manual for your car.It has a lot of info.There are pages in there that will show you which dimple on the firewall to drill out for mounting holes etc.......Hope this help,Jim
firewall hole for tach wire
im building a 71 ss clone and need to know where to drill the firewall hole for the tach wire. as long as im drilling holes i also need to know where to drill the hole for the wiring that goes to the cowl hood solinod? thanks, Dave.
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