LS6 heads
#6
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iTrader: (4)
I feel like you would have to spend some cash to make an 853 head pick up that much power. Larger valves and the whole deal. I have seen 243s go for less then 500, between the small hp gain and bump in compression I think its worth it if you can find a good deal. Also 243s respond pretty well to porting, you can get them ported later on down the road and pick up even more power.