Ak1234, If you read my post carefully, I said the 427 block cannot be rebored much. For the 428, no problem as the bore walls are much thicker. Also as far as revs I was talking about a stock motor. Of course one can make a 428 rev, just not safely as much as a 427 can. People use 428 blocks because of cost, but for performance the 427 SO is a better block, just because of the priority oiling to the main bearings and bigger bores. But everything is relative and one can build a pretty good 428 motor. Don't forget, Ford in the 60's won Le Mans with a bone stock 427 in the MK4, this is proof on how good a 427 SO is out of the box.
As far as 351 Cleveland vs Windsor, again I am talking about stock motors, of course if you spend enough money, you can do almost anything. The Windsor was a truck engine, horrible heads, different firing order compared to a 289 or 302, definitely not a performer. Because of the taller cylinders, not many intakes available. This may have changed at present.
Again, a Cobra is not a Lincoln Continental, you want an engine that can rev. All v8s make tons of torque but it your engine dies at 4 grands, it will make for a very boring car!
Emmanuel[
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