Clicky The Rams time was almost exactly what I expected out of a 385 hp engine. Using the same formula the 440 HP Powerstroke should have made the run in 10.5 minutes.
Using the 2.5 % power loss per 1000 feet of elevation above sea level the gasser should have been making peak power of 303 HP at 10,000 feet. The diesel is rated at 310 HP. The power required to lift the extra 1000 lbs up 2225 ft in 10 minutes is 6.7 HP. So I would have guessed the two trucks to have had similar times. But, I would have guessed the six gears in the diesel to give a little better results than 7 gears in the gasser.