There's just no comparison between a SBC and an LS motor.... if you're looking for a great "up grade" from what you have now - just buy an LS motor or be sorry you wasted your money on old skool stuff. You'll be money ahead with the LS.
The HP figures you're throwing around require a LOT more expense than just the motor. I won't waste my time explaining this now - cause you're not there... but anyone on here will tell you this.
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