Quote:
Originally Posted by Jim Hawkins
As far as that iron head LS combo I think that was only available in a truck.
Not sure if that matters today.
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None of the allowed heads, Chevy Vortec Bowtie, Ford N-351, Mopar W-5 and the aftermarket approved heads were available in a production engine. The LS cast iron head is a production head. The LS cast iron production block is the same GM Performance offers for racing for engines making 1000+ HP.