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Ported 317 heads, yellow gmpp springs, comp cams pushrods

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Old 03-25-2013, 10:56 PM
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Default Ported 317 heads, yellow gmpp springs

Category: Engine - Power Adders
Price: $325
Location (State): Can-BC
Item Condition: Used
Shipping Information: Item Can be Shipped
Engine: LS1/LS6
LS Engine?: Fits LS Engine

For sale ported 317 heads complete with rockers and valve covers. They have the yellow gmpp valve springs. $325 obo. The heads were just pressure tested and alls good.
Last edited by tweeder; 04-01-2014 at 06:05 PM.
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Old 03-26-2013, 10:41 PM
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Couldn't upload pics, timed out so heres a link:

http://www.performancetrucks.net/for...shrods-515967/
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Old 03-28-2013, 11:37 PM
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Old 04-01-2013, 02:40 PM
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Old 04-08-2013, 12:33 AM
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Old 04-13-2013, 03:40 PM
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Old 04-13-2013, 06:07 PM
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what size cam did you have in the motor with these heads on it?
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Old 04-13-2013, 06:09 PM
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Originally Posted by evang240
what size cam did you have in the motor with these heads on it?
Comp cams 54-412-11
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Old 04-13-2013, 06:18 PM
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i was looking at something with a bit higher of a lift than that to run on my car... just short of .600 or so, spefically EPS cams. they reccomend a double spring set up, do you know if these would be able to handle that lift?
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Old 04-13-2013, 06:28 PM
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Originally Posted by evang240
i was looking at something with a bit higher of a lift than that to run on my car... just short of .600 or so, spefically EPS cams. they reccomend a double spring set up, do you know if these would be able to handle that lift?
From what I could find online, the max lift is .570. They aren't yellow anymore but blue.
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Old 04-27-2013, 09:57 PM
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Old 04-30-2013, 08:59 PM
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Old 05-05-2013, 01:38 PM
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Do you have flow numbers and are the springs dual and how much lift are they good to? Have they been milled at all? If so, what are the cc's? Thanks
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Old 05-05-2013, 01:43 PM
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Originally Posted by 01MagredC5
Do you have flow numbers and are the springs dual and how much lift are they good to? Have they been milled at all? If so, what are the cc's? Thanks
I do not ave any flow numbers, I bought them that way. The springs are single gmpp yellows, from what I've found online they're good to .570?. I don't believe the heads have been milled.
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Old 05-06-2013, 10:40 PM
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Well crap...if you knew the cc on them I'd buy.
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Old 05-06-2013, 10:44 PM
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Originally Posted by 01MagredC5
Well crap...if you knew the cc on them I'd buy.
They're stock cc, does porting increase the cc that much? It's gasket matched and the runners smoothened.
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Old 05-06-2013, 10:50 PM
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Originally Posted by tweeder
They're stock cc, does porting increase the cc that much? It's gasket matched and the runners smoothened.
No...the only way the cc can be reduced is if the heads are decked/milled. The reason I need to be sure is they would be going on my high boost 390 c.i. motor and I need something with a good size cc so the compression of the motor doesn't rise.
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Old 05-06-2013, 10:56 PM
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Originally Posted by 01MagredC5
No...the only way the cc can be reduced is if the heads are decked/milled. The reason I need to be sure is they would be going on my high boost 390 c.i. motor and I need something with a good size cc so the compression of the motor doesn't rise.
I'm not sure but I don't think they're milled. But you could always raise the cc with a thicker head gasket to tailor what you want.
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Old 05-07-2013, 09:13 AM
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How much for pushrods shipped to ky 41619
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Old 05-09-2013, 08:14 AM
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Originally Posted by aj99
How much for pushrods shipped to ky 41619
I'd like to sell all together, that and everything's all packaged up.
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