engine temp

Good morning fellow vette fiends! Quick question.... What is the best switch or kit to buy and install that turns the cooling fan on at lower Temps so it doesn't ride so hot?

So I have a 1990 L98 and just had the intake done and everything fixed up. I know these cars run a little hot but is it normal in 111 degrees weather for the temp to basically pin at 260 for a few before it drops a bit? Mine did it just a little bit ago on the way home from work. I would love...