You would really be better off trading the car in on a MTX. You may be able to find a dealer sitting on a 5 speed and willing to trade pretty near outright because it is harder to sell a MTX then an ATX.
Green 96 mystique gs 4cyl mtx
16.9 in the 1/4 mile @102500 miles
95SE in Midnight Red MTX
MSDS headers and y-pipe
SVT exhaust
SVT UIM
Optimized se TB.
Full pre 98 SVT body kit
15.741 @ 87.73mph :)