I have noticed lately that alot of Lightning owners have gotten used Navi engines and rebuilt them to put in their trucks to replace the 2V engines. Add to that, many of them are throwing on turbo's(some are going twin turbo) instead of the supercharger. Its starting to become a big thing to dump the 2V engine in favor of the 4V because its so much better and easier to get more power from them.
I think it would be interesting to see some one do the same with a Mustang. Get a used Navi engine, rebuild it with forged parts, port the heads and get some nice cams and then throw on a power adder. A engine like that can make one sick Mustang. All it needs is somebody with the money, time, and ablility to do it.