Repairing a 1965-1967 GTO Tach - Hot Rod Network Jul 02, 2014Repairing the tach on this 1965 Pontiac GTO was easy, thanks to an aftermarket replacement that fits right in with the original instrument-cluster housing! 1966 gto tach | eBay Find great deals on eBay for 1966 gto tach. Shop with confidence. Skip to main content. eBay Logo: Shop by category. 67-72 ALL Pontiac GTO Trans Am Factory Hood Tach Tachometer Wire Harness Clip ea (Fits: 1966 GTO) Brand New. $12. Buy It Now +$3 shipping. SPONSORED.