Quote:
Originally Posted by SeanPlunk
I don't think that's correct.
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LS6 heads are the same as the LS2 heads. (springs do differ)
You can use LS3 heads on a LS2 block but not on a LS1/LS6 block (This is mainly do to bore size LS1/LS6 = 3.898 LS2 = 4.000 LS3/LS9/LSA = 4.060 LS7 = 4.125 )
LS6's are better for and NA application
LS2's are better for FI application (it gets called the truck motor because of the gm LQ9)