Fan too close to radiator?
Mine stays at 207 at the stat house, no matter what, including idling around on the hottest days of summer at 550rpm/3.5 mph@5* timing.
To be fair, my car does have a shroud; I mean I had it so I installed it.
My 80 Volare had no shroud, had a 4-blade fan, and a 9.5Scr slanty, that ran rock steady as well....... as long as the rad had water in it, lol. I've had many 318 cars/no A-C that ran just fine with 4-blades and broken or no shrouds.
But I admit all my 318/auto A/C-equipped vehicles had shrouds and NOT 4-blade fans.. I've been driving since 1969, so I've had a lot of cars, mostly Mopes.
I just can't see a 273/no A-C needing a 7-blade..... but if you got it, it can't hurt, can it? lol.