GM really has done their homework with these motors. Im building a 440 cid LSX block based version. I have the short deck LSX block, but you could still max this thing out at about 480 cid. But my goal it too build 1200hp streetable, and thats not hard with a turbo or supercharger! Plus id like too leave room for rebuilding if i have too. I would go with more cubes but normally anything over 4 inches of stroke isnt good for the street.
The LSX block can handle up to 2500hp, and thats some serious power for a small block. Not to mention the heads alone are six bolts per cylinder, and push 370cfm on the intake out of the box. The skies the limit with this block!
Also, the aluminum production block isnt a bad choice either, the weight savings alone makes this thing a great selection for racing if its setup right.
