I'm running the TRF yellow fan on my '3... I didn't have to move my radiator any, but I did replace my engine and trans mounts; still, the fan is close to the crossbrace, YMMV. I also had my radiator boiled out, and the hole filled.
If the outside temp is 100º+, or 60º, like last Saturday, my temp gauge measures a tick over the 185º mark, and measured digitally as 177º. I'd recommend the fan, but then I've never driven my car w/ the original 4-blader...