i have a 06 GT auto and was going to do the swap. the price new for the swap less install was $6800 and it was the engine harness, an ecu, a pcm, a tcm, a master/slave cylinder, all the hydraulic lines, a brake pedal assembly, a T5650, and a driveshaft. the clutch wasnt included, but youll need to get the whole shebang, ie the flywheel, clutch, and diaphram for a hydraulic throw out bearing. save the money and get a built auto transmission they're anywhere btwn $3000-$4500 and its straight plug and play if you keep the same stall. i got the tci 5r55s streetfighter and it hold up to some pretty high punishment. ill launch the thing at 2200 rpms and use the transbrake while engine breaking, and its doing just fine. even after four months of weekly runs down the strip. itll also take down a manual
trans with close power just because of the shift points. a built auto can, and will, shift faster than a person can. plus people think my car's slow due to the fact its an auto and the look on their face is priceless after they race you.
imho, keep the auto. its good to 480whp (i blew out the stock one at 490 mid-tune, its at 540whp and 680wtorq on 93 octane) and the shifting on a built one is amazing. it was the best thing i bought, even more so than the blower.