90C is great for FL.
I use a 185 stat, Mine was running 2 the 100c mark and 100+?? area in traffic. (this was prior to my fans being changed)
I switched to a Fahrenheit VDO gauge Pn 310-195, uses the same sender.
https://www.summitracing.com/parts/vdo-310-195
Easier to to read at a glance for me and the range markings are more plentiful.
I did the same thing on the
Oil press gauge.
https://www.summitracing.com/parts/VDO-350-1941