Hey- I have a 88 Camaro Sport Coupe originally a 2.8 litre, i swapped it over to a 383 stroker (.30 over) and i blew it up, so i went .60 over on my new engine making it a 388 stroker(the block is a 81 4 bolt main). I have a 165 degree thermostat and my timing is set correctly. I am using the stock electric fan which runs constantly and a aftermarket 2 core jegs radiator, and a stock water pump. I am playing hell trying to keep this engine cool, with my old 383 i would run around 190 to 200 degrees with this new 388 i am running 240-260 when driving and about 210 at idle. Anyone have any ideas how i could keep it cooler?

 

Replace the electric fan with a 85/86 F-body carbed 305 serpentine belt and fan/shroud system with the stock pulleys.
Source: Any junk yard $50. (shroud, fan, water pump, crank,
alt, power-steering pulley set, and belts).
Inspect the lower rad hose to see if it is soft or missing inner spring. They can collapse when hot. Inspect the water pump for a corroded pump impeller. (poor water flow). Is the rad a V-8 rad?
If you have the Jegster (Sirroco) lightweight rad, it is for drag use only not designed for normal street use. Get a full size
replacement rad for a 350 F-body.

Reduce your anti freeze/ water ratio... more water=better cooling.
Try some Redline Water Wetter. Good for abour 10 deg cooler.