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Old 04-12-2010, 10:34 AM
Bobcat Bobcat is offline
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Join Date: Apr 2007
Cobra Make, Engine: # 757 ERA 427 SC , 482 Al. big block
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I`m using a Stant # 13478 , which is a 180 degree unit with two 1/8" holes drilled in it . Checked it out before install and it opened exactly when it was supposed to. NAPA here carries them as do several others . This is also the one that Gessford Machine recommends and uses .

Bob
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