From the site you posted, it links to this article.
http://www.musclemustangfastfords.co...500/index.html
"It featured forged pistons and Manley rods, which racers would normally term as a "built short-block." This gave the bottom-end superior strength, and with some simple upgrades, allowed Cobra engines to reach the 800-900hp level."
"Performance that was unheard of with bolt-ons was just a few mods and less than $2,000 away. MM&FF modified one of the first Terminators, which ultimately ran 11.68 with just a small drive pulley, a K&N filter, the front antiroll bar removed, and M/T tires. Bone-stock it ran 12.43 at 113 mph!"
They made about 20,000 SVT Cobra Terminators, btw.