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Old 06-26-2010, 10:17 PM
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s10 headers

hey everyone, my name is nathan. I have a 1987 gmc s15 with a 350. it has a hydrollic roller cam.. 502-510 lift, 106 centerlines, flat top pistons, edelbrock aluminum performer rpm heads, a dual plane, high rise intake, and has a holley 750, mechanical. i take it to the track a bit but i also drive it a lot on the street, and its time for new headers, and i was wondering if i shud go with 1 5/8 or 1 3/4, what is the benefits/ disadvantages to each.. i'm looking for sumthing that wont kill me on the strip but is still streetable... also any guesses on engine hp? thanks for your time.compression is 9.8-1

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Old 06-26-2010, 10:27 PM
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I`d use 1 5/8. If it were a 383 or 400 with the same mods I`d use 1 3/4.
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Old 06-26-2010, 10:40 PM
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1-5/8" will work fine, but if you think you might use nitrous in the future, or go to a 383 in the same truck now would be a good time to get the 1-3/4" so you are prepared. They won't hurt you unless you use too short a collector.
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Old 06-27-2010, 09:37 AM
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keep in mind on a v8 s10 swap, you need specific swap headers
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Old 06-27-2010, 07:41 PM
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ok thanks guys, yes i know i have the correct headers now that wrap around the steering shaft, i just wasn't sure if 1 3/4 would give me more power or just overkill, thanks.
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