Just scored a Super Six and matching trans
I certainly don't disagree with you; slant-6s and boost go well together for all the reasons you say. But I regard the naturally-aspirated \6 as…I donno, call it "less hopeless" than it sounds like you do for high-perf applications.
Oh, I don't think there's anything "hopeless" about a well-built, normally-aspirated /6... I'm not so sure you can get 250 horsepower out of one, but I would LOVE to be proven wrong about that!
There is a guy in SoCal with a Black Gen. I Valiant that is running some REALLY quick numbers with his normally-aspirated 225, but he has gone to great lengths (SMART!!!) to lighten the chassis, and the car only weighs about 2,300 pounds. I really admire the way that car runs; just wish I could remember his name!!! Hope our car leaves the line as well as that one does!!!!
Forced induction is not the easiest thing. and if I had a /6 "street-car" and just wanted a 14 second ride, I might go the normally-aspirated route for simplicity's sake,but we need to be realistic about the limitations imposed when the only thing filling the cylinders is atmospheric pressure. Even 7 pounds of boost works magic on these motors, and you could probably run 7 pounds of boost on a stock shortblock and head with no problems if you were careful with the ignition timing and added a meth/water injector.
The next turbo motor I build will have a stock exhaust manifold with a turbo mounting flange welded to the manifold outlet. This engin we are putting together, now, has an elaborate, expensive-to-build header that I thought was necessary at the time, but now, I am not so sure. It cost us a cool thousand dollars to create that header (no kidding!), and that money could have gone for something else, such as a better cylinder head if we'd just used the stock manifold, instead. One day, I may do a bask-to-back test of the two exhaust systems to see if we threw our money away. I'm very curious about that.:read2:
We live, and learn!