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Old 03-06-2011, 02:11 AM
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small block chevy vortec heads & intake

does any one have experience racing this ninties combo, asking for reason I heard due to their design basically they could produce between 30 & 50 horse more than so say seventies heads & intake.

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Old 03-06-2011, 02:17 AM
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from what i gathered these heads (vortect heads) realy flow tremendously better and out preform the old style hands down... just my .02
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Old 03-06-2011, 02:17 AM
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What you have heard is exactly right. The Vortec head is the best head ever installed by the factory on a production Generation 1 SBC. Nothing from the 70's or 80's even comes close, and the Vortecs are even better than the "infamous" Fuelie(or "camel hump") heads from the 60's.
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Old 03-06-2011, 04:23 AM
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i am in the process of building a 496 wish they had vortecs ft them lol... but a 383 with a set of freshened up set of vortects should be a nice street motor
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Old 03-06-2011, 05:28 AM
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I have a 1970 350 bored .30 over with 4 bolt main w/GM/crane solid lifter cam (459/486 lift) with 492 straight plug heads GM winters intake and 750 Holley(in 1985 s10 blazer 4x2) how much if any would Vortec heads and intake help me?
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Old 03-06-2011, 06:05 AM
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Quote:
Originally Posted by rwa1015
I have a 1970 350 bored .30 over with 4 bolt main w/GM/crane solid lifter cam (459/486 lift) with 492 straight plug heads GM winters intake and 750 Holley(in 1985 s10 blazer 4x2) how much if any would Vortec heads and intake help me?
The 492's are Double Humps, so 30-40HP increase.
The stock Vortec's need Mods for Cams with over .450" lift.
This has everything about Vortecs>> http://www.nastyz28.com/forum/showthread.php?t=56505

This is a good comparison & a lot less to look thru>> http://www.onedirt.com/forum/guide-v...eads-2016.html
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