I have a similar issue, very long legs and a short torso. However I also have really long arms - +5 ape index for you climbers (mean my wing span is 5" more than my height). I use a 110 stem on a Lemond 55cm with about 3.5" of drop. I've been measured for a custom and this particular frame is within mm of custom sizing. I had to ride a whole bunch of bikes to find one that for me worked and having the custom fit sizing was helpful.