Hey Completely new to this forum as i have just gotten my dream car which is my 1965 Mustang 289 . Although I've had it for little over 2 weeks Ive noticed every now and then the temperature will go just a little shy of three quarters on the stock temp gauge. it hasn’t ever exceed three quarters and it does go back down to half way so i know it gets coolant. It does have an brand new aftermarket 2 row aluminum radiator and its running a high flow 180 temp thermostat. Ive heard people say a high flow 195 could be best for the engine i just don’t know if that’ll fix the issue could it? I don’t know if i explained that the best way but if you guys have run into this issue before how did you guys handle it or is this normal for the older cars. Anything is appreciated.