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Old Dec 5, 2016 | 02:33 PM
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looking for some advice and suggestions for some cnc'd heads that will go on a stock rebuilt 6.0 iron block with dished stock pistons. using a texas speed low lift cam 216 / 220 500 lift and 111 lsa stock truck intake and throttle body going in a 2500hd with a 4l80 and 4:11's
the truck will be used for towing and plowing still so I want a lot of low end torque and still want to keep the compression low
the stock 317's are junk exhaust seats are wasted so if I have to replace prob time to upgrade

also like to keep the cost down looking at the texas speed stage 2.5 lq9 but......
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Old Dec 5, 2016 | 02:45 PM
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You will gain very little from larger port heads with a .500 lift cam.
Either swap to another set of 317s and have them milled to bump compression a little, or get a set of either 243 or 799 castings and call it done.
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Old Dec 5, 2016 | 02:49 PM
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soory I meant 550 lift
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Old Dec 5, 2016 | 04:57 PM
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I still stand by my recommendation.
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Old Dec 6, 2016 | 12:02 AM
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will a ported head lose low end torque? is there a disadvantage to running them? I only want to buy heads for this truck once. if I decide to up the cam later I don't want to have to swap heads then
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Old Dec 6, 2016 | 12:40 AM
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the flow numbers of a stock 317 vs the PRC stage 1 and 2.5 only differ slightly up to .300 lift
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Old Dec 6, 2016 | 01:23 PM
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look at the heads from TSP that have the small chambers. compression is your best friend. thin head gasket also
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