Hey- I am building a 406 to put into my 86 camaro sport coupe previously a 2.8 litre. I was wondering if the stock radiator from the v-6 would be enough to cool the 406 at all... im not too worried if it runs a little bit hot because i wont be driving for long periods of time and i live out in the boonies so its pretty much wide open roads. I plan on using the stock electric fan setup as well. Im getting a new water pump and i have the stock air dam on the front of the car. What do you guys think will it run too hot or not? The 406 will be pushing around 380-400 HP with cast heads.

 

your gonna bake that motor, as it is rite now with my 406 pushing the same amount of power over heats in stop n go trafic. i have a aluminum Iroc rad and twin electric fans. at high way speeds i run at 195 with the fans off. your best bet is get a after market rad with a good flex fan and a shroud. that should keep you cool man

 

i used a rad. from a v-8 car for a year. i think i bought it at a junk yard for $40. if i remember right in 88 they went to a slightly bigger rad for the v8's. when i used it , it did ok on the road but wouldn't cool in traffic.