To partially answer the original question, I spoke with Glenn Self on the phone about the potential for this engine when I saw the naturally aspirated one in Hot Rod that made 590 HP with a 3-2bbl setup on it. He said the engine needed extensive custom work and some custom (read: mui dinero) pieces to get it to make big power. He also said the cylinder head made it worth it. I asked him if he was trying to turbo his way to 650hp (which is the number I needed) which way would he go 4.2 or 292 and he said the 4.2 would be his choice. We didn't get into detail on computer at all, I was mostly concerned with durability. If you are serious about the swap, they have done some work on this engine and can help you out.
