I replaced my 700R4 earlier ..around april i think, this year with a 700Raptor Jr,
http://www.transmissioncenter.net/highperf700r4.htm so far i've been happy with it, not sure what gears are in the 10 bolt, from guessing they're pretty tall highway gears around 2:46 or so, I have a 2300 stall converter in and am running 295/50/15's on the back. I would like to put some 3:73's in with a posi, just haven't spent the money yet, but the truck will still plant you in the seat on a good launch. My od kicks in around 50 mph or so, and doing about 70 i stay around 2000rpm maybe a little over. But based on pure cost, i would've probably been just as happy with a stout turbo 350 for around 6or $700 instead of the $1500 raptor.