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  #16 (permalink)  
Old 11-12-2012, 06:26 AM
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Be sure to drill steam holes in the 307 heads for a 400sbc if you use the 307 heads

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  #17 (permalink)  
Old 11-12-2012, 06:36 AM
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Here is a page on the 400 SBC steam holes.
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Old 11-12-2012, 06:39 AM
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A 165 thermostat is more appropriate given the 400's steam hole cooling system.

Any crossover head in use,other than a 400,needs to be drilled for the 400's steam holes.
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Old 11-12-2012, 11:15 AM
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Ok so this is completely different then how I have always set up a carb fitting on the intake to the trans rear base to the break booster front to the pvc also I do kno the dates and will look at the wholes just I'm almost certin there the same ones iv always used
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  #20 (permalink)  
Old 11-12-2012, 12:20 PM
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Stem holes have been drilled and heads resurfaced
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  #21 (permalink)  
Old 11-12-2012, 06:10 PM
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Typo

Quote:
Originally Posted by cobalt327 View Post
You need a vacuum source for the PCV system. This is usually a larger port at the rear of the carb base.
Should read to the front port, not the rear. Rear can be the booster if you want or the manifold- it doesn't matter as long as its large enough and is manifold vacuum.
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