I thought turbos made more power from mid-range to high-range? Who coined the phrase "turbo-lag"? If I were going with a built 235, I would bore it a bit, and go to town on the heads with larger valves, polishing, and even honing. The heads are holding the 235 back. And I think a 4 barrel is a bit much. How about 3 singles? That would be coooool. Don't know if that is possible?