Quote:
Originally Posted by KW Baraka
The LS3 427ci.....IS NOT......the same as the GM LS7 427ci.
That said, your LS7 heads might fit the LS3 but you'll want to have the cylinders bored to at least 4.07". And even then, the tightness of the bores will not allow you to take full advantage of the LS7 heads flow capabilities.
Bottom line, you will not get the full benefits of the LS7 Max Performance kit with the LS3 block. Plain and simple.
KW
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Got it. I'll have to pick GPIs brain when the time comes.
Since I have these GPI Max Performance heads, the next step would be to build the bottom end. I'm just not sure what that entails (i.e. boring and stroking the stock LS3 block, getting an entirely new block, etc.).
It would be a shame to have to just ditch the heads when it comes time for a new bottom end, you know?