I use them on my cars as we have 110/1120 degree heat here in the Summer, but for street driving I don't think you really need them unless you plan to spend a lot of time in traffic. I also ran a thermostat on mine that would bypass the cooler until the
oil got up to temperature. Also I raced and drive my cars hard so the thermostat opened pretty quickly. I had a 1964 Galaxie 500-XL with the factory 427 and it never had an
oil cooler and never did overheat. The same for the 427 Tunnel Port that I had to get rid of because it was just to radical for street driving.
Ron