You haven't said what water pump drive you are running. Make sure you are spinning the water pump fast enough at least 1 to 1 with the crank. I have a little more engine in my Savoy and I'm running a 26" 3 row rad with an 18" thermo clutch fan. My pulleys are 440 source repo units with a Flow-Kooler high volume pump and my car stays around 180 on a 90 degree day on the highway at 3600 RPM. It does creep up around 190 when sitting at a light but that is not really hot. I haven't put a shroud on it yet but that would probably cure the low speed cooling around town. On the alternator you don't need a 100 amp unit but you could use a basic Toyota internal regulator alternator unit. The bracket kit and plug you can get from AR Engineering and I suggest a Factory Denso unit over a discount rebuilt unit from the zone or one of the other stores. They charge 14.5 volts at 900 RPM and do away with the failure prone firewall mounted regulator.

Gus