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A relatively easy to find head to swap on the 250 inline Chevy is casting number 3864883 from a 194 cid Chevy inline 6 engine. If it's milled 0.060", it will give about 10:1 compression on a Chevy 250 using stock type pistons.
A relatively easy to find head to swap on the 250 inline Chevy is casting number 3864883 from a 194 cid Chevy inline 6 engine. If it's milled 0.060", it will give about 10:1 compression on a Chevy 250 using stock type pistons.
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===One-off custom aluminum head===
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The head shown below was made from a pair of Pro Topline SBC heads cut and welded to make them into an inline six head destined to be used on a 292 Chevy block.
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[[File:Protopline inline 6 head 1.jpg]]
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[[File:Protopline inline 6 head 2.jpg]]
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[[File:Protopline inline 6 head 3.jpg]]
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Just goes to show you what can be done with enough skill, tools, time and dedication.
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[http://sissellautomotive.com/ Kay Sissell] has also done some custom heads for the inline Chevy six. He now offers ported cast iron heads and other parts.
===Intake port mods===
===Intake port mods===
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|[[File:Holley 390cfm.jpg|thumb|275px|center|Holley 0-8007 model 4160 390 CFM square bore. 4 barrel, vacuum secondary, electric choke]]
|[[File:Holley 390cfm.jpg|thumb|275px|center|Holley 0-8007 model 4160 390 CFM square bore. 4 barrel, vacuum secondary, electric choke]]
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==Camshafts==
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There are still manufacturers stocking cams for the Chevy inline engines.
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*[http://www.iskycams.com/onlinecatalog.html Isky catalog], see pages 126-127
==Timing gears==
==Timing gears==
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*[http://www.stoveboltengineco.com/ Langdon’s Stovebolt Engine Co.]
*[http://www.stoveboltengineco.com/ Langdon’s Stovebolt Engine Co.]
*[http://www.cliffordperformance.net/index.html Clifford Performance]
*[http://www.cliffordperformance.net/index.html Clifford Performance]
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*[http://sissellautomotive.com/ Sissells Automotive]
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[[Category:Engine]]
[[Category:Engine]]
[[Category:GM]]
[[Category:GM]]