[CST10]

When I added a vintage AC system to my 462 CI C10, the temperature rose from 190 degrees to 210 degrees and also seemed like it wasn't going to stop.

I ran a test, idling in gear with E brake on and no AC in 95 degree boiling sun the truck ran between 190-195 for at least 20 minutes.

Same test but with AC on, it ran between 210-215 degrees. Where it would have stopped, I don't know but I turned it off at 215. Took out the temp gun while idling and the condenser was running 150 degrees........that's 55 degrees hotter than the ambient temp at the time. That kind of explains what was happening to my system. The radiator was seeing a 150 degree intake vs 95 degrees which caused it to heat up.

I added a 12" 1600 CFM pusher fan to the front of the condenser on the drivers side with an under dash switch. When the temp rises to 205, I turn it on and it will hold the temperature to 210 degrees for awhile.

Now my 68 with no AC and the stock 250CI and manual tranny runs at 200-205 with that little dinky 4 blade fan and factory no shroud set up.

Just sayin that you may have nothing to worry about.