Isn't a stock Focus 86mm bore x 86 mm stroke? 86 mm = 3.3858"; the 2.011 number is obviously an error,
We were allowed to run aftermarket cams in Focus motors in the Illini Series and Johnny Heydenriech actual won a dirt feature in one this year. It was a very dry slick track.
Even bumping the compression and changing everything allowed won't make up for .4 liters more compression. Its like running a 360 sprint car vs. a 410 with no weight break. Having run a Scream Focus, a Scream Focus with comp cams, and a completely stock 2.0 liter Honda F motor against the 2.4 Liter Ecotec I wouldn't advise spending a dime on the Focus. Neat little motor with 1990s technology that won't compete with current stuff, Stock Focus was 140 HP, Screams were 185 HP. Cammed Scream Focus maybe got to 205 HP. The top Ecotecs have to be 250/260 HP based on track speed.