Sure, throw gears from an early Coupe into the tranny, and ka-boom, you'll top out somewhere around 160mph, if you get the horses to get there...BTW, I've had both my GT and my 4KQ at or over 116mph (the Coupe has a 3.91 final, though, not a 4.11) - I think that 125 is more accurate for a engine limited top speed. Later! Carter