I've done both of mine in the last year. Impact would make it easier, but you can remove the dustcover off the flywheel, and jam a large something or other in there to keep it from turning to remove it.
Torque specifications are in Techinfo.
You'll have to get creative with the bolts for the puller. Most pullers don't have the right ones. My suggestion is to get the new balancer first, then go to the parts store and rent or buy the right puller and bolts/washers. Bear in mind that the threads are pretty fine for the 3 bolts you'll need, so make sure you have the puller installed firmly, but not over-tight. I had one strip out on me last July, and I barely got it off. My boss had to weld up a puller on the HB itself for the same reason.
The SE should be easier than the L67'*. You have more room to work with, and the balancer may come off easier.