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09-28-2003, 08:19 PM
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vortec heads on a 327?
What do I need to get to put vortec heads on a 1968 327 and why is this a thing to do?
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09-28-2003, 08:27 PM
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just buy the heads and all the hardware it needs, rockers, center bolt valve covers, intake manifold, everything else is a bolt on. The vortec heads have a different runner shape than past small block heads that flow far better, they also have a reshaped combustion chamber that`s more efficient, set the Quench distance at about .046 or slightly higher,, and you`ll be fine. you could use a GM head gasket that uses a .028 thickness and if the pistons measure .020 in the bore that will work fine, only make sure the block and heads are skim decked to assure flatness. if the Quench is over .060 it does no good and the better chamber of the vortecs would be a advantage you didn`t use.
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09-28-2003, 08:28 PM
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You need a set of vortec heads, gaskets for em, and a vortec designed intake. Its the thing to do because most people argue that they are the best heads for the price involved. 550$ for some pretty good flowing cast heads. But they aren't great for everything. Think they only work well up to 5500rpm or so but I could be wrong on that aspect. Do a search here or check my past threads for some more info on em with a 327.
Eric
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09-28-2003, 08:34 PM
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DoubleVision
This 327 is in a 1968 Impala so is it a Large J motor?
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09-28-2003, 09:05 PM
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it should be a large journal, but journal size plays no role, the heads will still bolt on large or small journal blocks. the only changes to these blocks were the size of the rod and main bearing caps, the decks and water ports stayed the same.
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