OK, I posted this in the towing forum , but it's completely dead in there, and I have only gotten one response since Friday (thanks Bob). I also searched though tons of posts, but got sick of reading Timmay's IMO gospel every other post (the guy knew stuff, but as ya know could be a LITTLE stubborn). Oh, and I emailed TC for spring capacities, but still no response. So I'm posting here to get more traffic and hopefully some well informed fact-based opinions. Anyways, I wanna lift my '91 3/4ton Burb 4in, which I dunno may only equal 2" since it's already 2" higher than my stock 1/2 ton. I don't want to keep the rear springs because they have 9-10 leaves and ride like crap, but I plan on towing up to 10K at some point down the road, so will 4" TC rear lift springs kill my towing ability? If so, could I correct the problem sufficiently with Air Helper Springs? Or am I stuck forever at stock height and crappy ride to preserve my towing ability?