Hopefully the car is already blocked up in the air. Easiest to remove the flywheel dust shield and lower bellhousing bolts from below, undo the guibo bolts (3 x 19mm) and centre support (ditto)to remove the front half of the driveshaft, then drop the rear trans crossmember (2 x 13 mm nuts) and front (engine) subframe (4 x 18 or 19 mm bolts). Then you can reach the top bellhousing bolts easily while the engine and trans assembly is sitting on the ground, cushioned by the old tire you put under it beforehand. If not possible to do this, an alternative way to get the top bolts is with loooong extensions on your ratchet, maybe 3 feet, and a universal joint too, and reach up from below. Much easier on the knuckles but harder on the shoulder muscles. Definitely need box end wrenches 10, 13, 14, 17, 18, 19 mm. Same sizes in sockets, nice to have duplicates too. Managed to do it this way in less than an hour, in minus 20 temperatures last month. Have fun.