Overheating Issues with Front Mount Kit
Check everything that has been mentioned and make sure that when your fans are on, air is actually passing through the radiator. When my Derale fans are on hi, you can definitely feel the air passing through the condenser and the radiator.
I also have the Huron Speed AC kit with two Derale pusher fans.
To answer your question, use 30-amp relays, good quality 40-amp fuses or circuit breakers work well too for the amp spikes which Derale's are known for and good quality 10-gauge wire for the power and ground.
Use the factory fan wires to activate the relay and that way you still get individual fan control.

The Best V8 Stories One Small Block at Time
I have a 00 Z28 with a Huron Speed AC retaining kit. Turbo has a blanket on it. I kept stock radiator in stock location. At the time I was about to install the Derale Pusher Fans were back ordered for 2 months so I purchased two of these: Perma-Cool Standard Electric Fans 19122.
It is currently experiencing overheating issues even on the dyno with a giant fan on it. Very perplexed since the twin fans should be supplying more than enough CFM. The shop replaced the thermostat but I figured that wouldn't help, it didn't. They are going to try to use the stock fans with the shroud to help.
Any other ideas? I have talked with several Huron Speed kit owners and usually everyone ran just fine even in MUCH hotter weather (its only 45 degrees here)....
400-amp output on an alternator is pretty high especially if you're mostly stock.
Who is the reputable company, they don't have anything to add?
I run a JS Alternator 325amp unit and it works fantastic, full output from idle to my 7,500rpm shift point, never misses a beat.











