02 AC 5100 Front Lift Height

I've got 5100's on my 02 AC, with unknown springs (17mm bar diameter, so likely OME 2885). I've only got about 19.5" from hub center to fender on the 3rd notch. I'm probably 1-2" away from level which is the goal. I'm running 265/75R16 with 1.25" spacers to eliminate frame rub at full lock.

I purchased the spring/shock set off Craigslist, wish I knew exactly what spring it was. Maybe that's why I'm not getting much lift?

I've already dropped the diff, wondering if anyone has any experience getting to 21"? Higher notch isn't advised by Bilstein but maybe with UCAs I can get there safely?