My 55 with a 312 engine (yes later engine) does not overheat usually but I had to let it idle for 10 min in AZ blast furnace temps the other day and the temp reached the high end of OK. I have a new redesigned spacer plate to install. Would it be wise to install the high volume water pump at the same time? I am referring to the water pump with fins on both sides of the impeller. Or would that be overkill or have no effect? My wife wants A/C installed at some point, but that may take some fancy talking as the car is still 6V.