Re: '67 OER temp guage not showing correct temp
I'm not sure on a 67 but on a 69 you are correct about not using the external resistor on the OER gauges. Where is you sending unit located? (on the head)? Are you sure you have the correct sending unit on the car. I've read about air pockets getting trapped in the cooling systems giving you weird readings like your seeing.
69 Z/28. 302DZ, Autogear M22, Red w/black stripes.
69 Camaro, ZZ4, 700R4, 8.5 3:42 posi, X11
70 Nova SS 396, 4sp, 3:55 12 bolt