Which Fluids are recommended? 1969 Dodge Dart 273 3 Speed Torqueflight Tranny

Hey Nico, in New Mexico I'd probably use 20w50 oil on a worn 273. If it is newly rebuilt I'd probably go with 10w40.
For coolant use a green ethylene glycol. I buy the concentrated kind and mix 50% coolant- 50% distilled water.
Transmission fluid, I use Dexron III.