LS1TECH - Camaro and Firebird Forum Discussion

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

374's or 643's?

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Old 12-20-2006, 11:28 PM
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JUICED96Z
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Default 374's or 643's?
Whats better for head porting? 374's or 643's?

I allways thought 643's but this guy says otherwise???

http://cgi.ebay.com/ebaymotors/92-9...1QQcmdZViewItem
 
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Old 12-21-2006, 12:04 AM
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The answer is both are good per Tpis:http://www.tpis.com/index.php?module...ted+Cyl.+Heads
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Old 12-21-2006, 12:20 AM
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Thanks
 
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