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  #31 (permalink)  
Old 07-11-2012, 05:13 AM
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This thread is just a little old!!!!
2003?

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  #32 (permalink)  
Old 07-11-2012, 11:37 AM
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Just wanted to add that there is different vortec heads. There is the ones that come from trucks and they are cast for economy and are not machinable to change for power applications. Check your casting numbers!
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  #33 (permalink)  
Old 07-11-2012, 12:17 PM
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The Vortecs ONLY come from trucks, and the 5.7 Vortec heads ONLY come with casting numbers ending in 906 or 062.
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  #34 (permalink)  
Old 07-11-2012, 01:10 PM
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Vortec heads

I took a pair of new gm Vortec heads had them drilled and tapped forguide plates, had the seat and guide turned down for a bigger lift cam. These are the BEST performing heads I have ever used for the price. And they are bullet proof. Best bang for the buck.
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  #35 (permalink)  
Old 07-11-2012, 05:47 PM
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vortec heads

watch some of the parts suppliers- you can buy aluminun 220cmf with 202 valves for $600 A PAIR. dont get any better.
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  #36 (permalink)  
Old 07-11-2012, 09:02 PM
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So what did the heads come on , only trucks ? . What would I be looking for in a scrap yard .
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  #37 (permalink)  
Old 07-12-2012, 11:34 AM
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vortec heads

For those who don't know (FTWDK), "Vortec heads are FORGED in Austrailia. ANYONE CAN GETa pair and do their own MACHINE WORK. "PRO COMP heads are "forged in Australia, sent to CHINA, and machined there. When I ended uo purchasing TWO pair (accidently), I tried to SEE the difference, "PRO COMP" heads are "forged in Australia, and MACHINED in CHINA! The Vortec-heads I decided to use are "FORGED in AUSTRAILIA, and MACHINED in FRESNO CALIFORNIA! Guess which heads I chose? YES, the ones MACHINED IN AMERICA. i.e., the ones MACHINED in FRESNO CA! Also, the "China-Vortec's cost $605 plus shipping. THE FRESNO-Vortecs cost $400 (by bid) and shipping was FREE! PAY ATTENTION to WHO you buy from, and WHERE the parts are made AND MACHINED. Also the SHIPPING CHARGES because there ARE folks that USE "shipping charges" against the unknowing & unweary.
Side by side, the only difference was; I could SEE a difference between to two, without doing research is, the Fresno-Vortecs have GREEN "keepers" and the CHINESE-Vortecs have BLACK keepers. THAT is the ONLY VISABLE difference! Oh, AND 200+ dollars shipping charge! Peace everyone
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  #38 (permalink)  
Old 07-12-2012, 01:40 PM
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J*gs sells these heads for $320 each, brand new, S*mmit Racing will match their price as well. Scoggin-Dickey sells them already modified with cut down guides, screw in studs, guide plates and better valve seals for a bit more. Bolt on and go.... too many J/Y heads wind up being cracked to be worth looking for them that way,
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  #39 (permalink)  
Old 07-12-2012, 03:48 PM
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exhast port configuration

I just installed a new GM Performance 350HO in my 57.
Note, the exhaust port configuration is also different. The space between the ports changed. I had to buy headers made for vortec heads from Heddman Hedders.
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  #40 (permalink)  
Old 07-12-2012, 07:36 PM
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The exhaust ports and headers are the same. Use gaskets to match them. Here is a picture of summits 9006 headers for $89 and vortec 906 heads. In my journal there are pictures of the fit , both sides, in my c10.

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  #41 (permalink)  
Old 07-12-2012, 09:13 PM
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Pro Comp Alum heads

Quote:
Originally Posted by bob ubben View Post
watch some of the parts suppliers- you can buy aluminun 220cmf with 202 valves for $600 A PAIR. dont get any better.
Watch those off brand aluminum heads. They don't heli coil plug or mounting threads and they are very soft. The spark plug recess holes are so tight most standard wall plug sockets won't fit. I have tried two sets with NO luck, would not reccomend. I have etec Eldebrock 220's on a 383 and they rock. Well made and are good for the 475 hp and almost that in TQ. My two cents worth
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  #42 (permalink)  
Old 07-13-2012, 09:43 AM
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My mistake, it wasn't the exhaust ports that were the issue, it was the spark plug location. GM mover them a little on Vortec headds, so you have to watch so the header tubes allow access to the plug location.
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  #43 (permalink)  
Old 07-23-2012, 05:44 PM
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Vortec heads

Vortec heads are the way to go for a low buck build. They give the most bang for your buck, assuming you have a way to modify the holes where the intake manifold bolts on. The holes will all line up, but they are on completely different angles. I personally believe that you should go with a vortec Intake manifold because re -drilled heads aren't as strong. (Just my opinion).
Also check out Pro-Comp Heads. By the time you factor in the cost at the machine shop with the vortec heads, they cost about the same. They have a variety of different combustion chamber sizes, and usually cost between $400 -$500. There are a lot of stores selling them new on Ebay. I tried a set on a 383 stroker, and I was very happy with the results. They are aluminum too. My only suggestion on the Pro-Comp heads is to avoid the angled spark plug holes. They cause clearance issues with most headers and exhaust manifolds. I have also bought world heads in the past, and been happy with them too. They just cost a bit more.
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