Thread: LS1 into a 73 cheyenne
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Old 12-10-2009, 06:18 PM   #25
clinebarger
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Join Date: May 2009
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Re: LS1 into a 73 cheyenne
There not LS6 heads either. LS6 heads have a 243 casting number. It looks like 799 on these or 79somthing
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