what are 317 heads
#1
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got heads off of 6 liter iron truck motor (9-17-04 dated in oil pan) has 317 stamped on the side of heads, and exhaust ports are "D" shaped. please help someone told me they were LS6 heads, if so are they exactly the same comp ratio? thanks for any info.
#2
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I'm not the expert on this, but they are definitely not LS6 heads, LS6 heads are 243 castings, that is all that I can help with. I think that the truck heads have a bigger combustion chamber around 72cc maybe?