about an hour and super easy if you have the tools and parts! [and dont run into any problems]
i did mine on the ground with 2 jacks, one to lift the car, one under the tranny for support. there is a DIY on here somewhere with pics.
the only thing i would say is replace the stretch bolts. i broke one putting everything back together and had to order it "special delivery" i could have ordered all 5 for what i paid for the 1. [they are supposed to be single use anyway]
hit me up if you have any specific questions. i have done 3 of em to date [2mkiv and 1 mkIII]