As long as you have a threadless steerer, and your stem has a removable clamp, you can get one lever set up where you feel you want it, then put the other lever on, loosely, and set the bar on a table top, having the bar right side up, so the drops are on the table, to get it into the same position. The table will contact the bar, and the end of the lever you installed first, move the second lever until the bar doesn't rock. Tighten, then install the bar on the bike.