head casting number question
11-10-2006, 07:02 PM
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head casting number question
Are LS1 and LS6 heads the same except for different valve springs? Do they have the same casting numbers? What is that number.
11-10-2006, 07:28 PM
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11-10-2006, 08:58 PM
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Originally Posted by 73-84 IMSA Widebody
Try this website for a reference source.
www.mortec.com/castnum.htm
www.mortec.com/castnum.htm
12564241...00-up...350..........Gen.III, "LS1", aluminum, 68cc
12564243...01-up...350/364......Gen.III, "LS6", "LS2", aluminum
11-11-2006, 12:18 AM
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Originally Posted by danswofford
Are LS1 and LS6 heads the same except for different valve springs? Do they have the same casting numbers? What is that number.
.....->http://users3.ev1.net/~black_ops/hea...2009-09-03.htm
11-11-2006, 06:43 AM
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Originally Posted by danswofford
Neat website. This is what I found. Thanks.
12564241...00-up...350..........Gen.III, "LS1", aluminum, 68cc
12564243...01-up...350/364......Gen.III, "LS6", "LS2", aluminum
12564241...00-up...350..........Gen.III, "LS1", aluminum, 68cc
12564243...01-up...350/364......Gen.III, "LS6", "LS2", aluminum
Must have been one of those NASCAR " HOW to cheat legaly" papers.