TAKH

I just bought a climbing harness with the hip rings, climbing beltand a ring in the center of the back - I tied my own prussic hitch and clip it right to the rear D-Ring. I don't know about hooking it to the vest - the seams might fail in a fall. If there's any doubt in your mind, you should probably invest in something with a rear loop designed specifically to handle that kind of load - or give it a field test.

You'll need rope that withstand several times your bodyweight and has some elasticity, because if you are free-falling for a few feet before the rope tightens, the force required to stop your fallwill increase exponentially.

Good climbing rope is available at REI.com but I got mine at Tractor Supply - it's not necessarily made for climbing, not quite as soft, but it was a little cheaper and it does the job - you can still tie good knots with it. It's rated around 1/2 ton and consists of several materials- basically a cotton shell with nylon guts.