C'mon guys..it's easier than that! Just remember that ANY motor
gains 250 hp and 312 lb ft when it's put in a Cobra! Just take the stock factory hp, and the differential above and square the result, then post it!
But to stay on topic, ditto on Desktop Dyno. One caution, don't plug in the static numbers on the main program as you will get some crazy numbers! 1012 hp???? Go thru each screen and plug in the real numbers from spec sheets and you'll get a very close approximation. I guess the old adage is true..crap in, crap out! Then off to a chassis dyno to get the real numbers....