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Old 03-03-2012, 08:47 PM
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Blazin72 Blazin72 is offline
You got a leaky spark tube...
 
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When I had my K5 Blazer I used a 180 deg thermostat with adjustable fan switch. The switch was set to turn the fans on at 205 and shut off at 190. Don't be afraid to let the engine get to 200. It's not going to hurt it. This was a supercharged 350 and I used a stock style copper tube 4 core radiator that came stock in the 3/4 and 1 ton pickups from the early 70s. The fans were Flex -a-Lite dual 12". They worked very well.
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