I drove my car with a 427 FE (iron heads, ally intake, 600 Holley, mech pump) in 110F stop go here in south africa. No carb spacer, no turkey pan. Hood closed, small scoop, under car exhaust with headers, small air filter.
16" pusher fan came on at 95°C, kept the engine under 100°C. I built it without inner fenders. And I left the gap between radiator top and body open, but shrouded the rest of the radiator.
It has no relevance in stop-go, but I had no
oil cooler either. Timing was properly set for idle, mid range and WOT (obviously)
Did you check under hood temperature?
The turkey pans, while good at speed, tend to become a terrible hear sink at low air flow.